155864105800 has 96 divisors (see below), whose sum is σ = 400807549800. Its totient is φ = 55994388480.

The previous prime is 155864105767. The next prime is 155864105851. The reversal of 155864105800 is 8501468551.

It can be written as a sum of positive squares in 12 ways, for example, as 24699894244 + 131164211556 = 157162^2 + 362166^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 713905 + ... + 906304.

Almost surely, 2^155864105800 is an apocalyptic number.

155864105800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155864105800 is an abundant number, since it is smaller than the sum of its proper divisors (244943444000).

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

155864105800 is a wasteful number, since it uses less digits than its factorization.

155864105800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620275 (or 1620266 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 43.

The spelling of 155864105800 in words is "one hundred fifty-five billion, eight hundred sixty-four million, one hundred five thousand, eight hundred".