155981801604 has 12 divisors (see below), whose sum is σ = 363957537104. Its totient is φ = 51993933864.

The previous prime is 155981801509. The next prime is 155981801617. The reversal of 155981801604 is 406108189551.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6499241722 + ... + 6499241745.

Almost surely, 2^155981801604 is an apocalyptic number.

It is an amenable number.

155981801604 is an abundant number, since it is smaller than the sum of its proper divisors (207975735500).

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

155981801604 is a wasteful number, since it uses less digits than its factorization.

155981801604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12998483474 (or 12998483472 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 48.

The spelling of 155981801604 in words is "one hundred fifty-five billion, nine hundred eighty-one million, eight hundred one thousand, six hundred four".