155891256860 has 24 divisors (see below), whose sum is σ = 329331955680. Its totient is φ = 61983109184.

The previous prime is 155891256809. The next prime is 155891256883. The reversal of 155891256860 is 68652198551.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 155891256796 and 155891256805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23333675 + ... + 23340354.

It is an arithmetic number, because the mean of its divisors is an integer number (13722164820).

Almost surely, 2^155891256860 is an apocalyptic number.

155891256860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155891256860 is an abundant number, since it is smaller than the sum of its proper divisors (173440698820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155891256860 is a wasteful number, since it uses less digits than its factorization.

155891256860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46674205 (or 46674203 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 56.

The spelling of 155891256860 in words is "one hundred fifty-five billion, eight hundred ninety-one million, two hundred fifty-six thousand, eight hundred sixty".