124549639952761 has 3 divisors (see below), whose sum is σ = 124549651112943. Its totient is φ = 124549628792580.

The previous prime is 124549639952753. The next prime is 124549639952783. The reversal of 124549639952761 is 167259936945421.

The square root of 124549639952761 is 11160181.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 96982729776361 + 27566910176400 = 9847981^2 + 5250420^2 .

It is not a de Polignac number, because 124549639952761 - 2³ = 124549639952753 is a prime.

It is a super-2 number, since 2×124549639952761² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124549639952701) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5580091 + ... + 16740271.

It is an arithmetic number, because the mean of its divisors is an integer number (41516550370981).

Almost surely, 2^{124549639952761} is an apocalyptic number.

124549639952761 is the 11160181-st square number.

124549639952761 is the 5580091-st centered octagonal number.

It is an amenable number.

124549639952761 is a deficient number, since it is larger than the sum of its proper divisors (11160182).

124549639952761 is an frugal number, since it uses more digits than its factorization.

124549639952761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22320362 (or 11160181 counting only the distinct ones).

The product of its digits is 881798400, while the sum is 73.

The spelling of 124549639952761 in words is "one hundred twenty-four trillion, five hundred forty-nine billion, six hundred thirty-nine million, nine hundred fifty-two thousand, seven hundred sixty-one".