155882042761 has 3 divisors (see below), whose sum is σ = 155882437581. Its totient is φ = 155881647942.

The previous prime is 155882042753. The next prime is 155882042809. The reversal of 155882042761 is 167240288551.

The square root of 155882042761 is 394819.

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 is not a de Polignac number, because 155882042761 - 2³ = 155882042753 is a prime.

It is a super-2 number, since 2×155882042761² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155882042731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 197410 + ... + 592228.

It is an arithmetic number, because the mean of its divisors is an integer number (51960812527).

Almost surely, 2^155882042761 is an apocalyptic number.

155882042761 is the 394819-th square number.

155882042761 is the 197410-th centered octagonal number.

It is an amenable number.

155882042761 is a deficient number, since it is larger than the sum of its proper divisors (394820).

155882042761 is an frugal number, since it uses more digits than its factorization.

155882042761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789638 (or 394819 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 49.

Multiplying 155882042761 by its sum of digits (49), we get a square (7638220095289 = 2763733²).

The spelling of 155882042761 in words is "one hundred fifty-five billion, eight hundred eighty-two million, forty-two thousand, seven hundred sixty-one".