49464873649 has 9 divisors (see below), whose sum is σ = 50846353131. Its totient is φ = 48119978520.

The previous prime is 49464873643. The next prime is 49464873677. The reversal of 49464873649 is 94637846494.

The square root of 49464873649 is 222407.

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

It can be written as a sum of positive squares in only one way, i.e., 44261848225 + 5203025424 = 210385^2 + 72132^2 .

It is not a de Polignac number, because 49464873649 - 2³ = 49464873641 is a prime.

It is a super-2 number, since 2×49464873649² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

Its product of digits (125411328) is a multiple of the sum of its prime divisors (6048).

It is not an unprimeable number, because it can be changed into a prime (49464873641) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8226054 + ... + 8232064.

Almost surely, 2^49464873649 is an apocalyptic number.

49464873649 is the 222407-th square number.

49464873649 is the 111204-th centered octagonal number.

It is an amenable number.

49464873649 is a deficient number, since it is larger than the sum of its proper divisors (1381479482).

49464873649 is an frugal number, since it uses more digits than its factorization.

49464873649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12096 (or 6048 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 64.

Multiplying 49464873649 by its sum of digits (64), we get a square (3165751913536 = 1779256²).

The spelling of 49464873649 in words is "forty-nine billion, four hundred sixty-four million, eight hundred seventy-three thousand, six hundred forty-nine".