155401538554 has 12 divisors (see below), whose sum is σ = 234677319534. Its totient is φ = 77179265552.

The previous prime is 155401538491. The next prime is 155401538561. The reversal of 155401538554 is 455835104551.

It can be written as a sum of positive squares in 3 ways, for example, as 53367930225 + 102033608329 = 231015^2 + 319427^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1705537 + ... + 1794340.

Almost surely, 2^155401538554 is an apocalyptic number.

155401538554 is a deficient number, since it is larger than the sum of its proper divisors (79275780980).

155401538554 is an equidigital number, since it uses as much as digits as its factorization.

155401538554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500177 (or 3500028 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 46.

The spelling of 155401538554 in words is "one hundred fifty-five billion, four hundred one million, five hundred thirty-eight thousand, five hundred fifty-four".