155556651440 has 40 divisors (see below), whose sum is σ = 367598229648. Its totient is φ = 61202615040.

The previous prime is 155556651431. The next prime is 155556651527. The reversal of 155556651440 is 44156655551.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15933302 + ... + 15943061.

Almost surely, 2^155556651440 is an apocalyptic number.

155556651440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155556651440 is an abundant number, since it is smaller than the sum of its proper divisors (212041578208).

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

155556651440 is a wasteful number, since it uses less digits than its factorization.

155556651440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31876437 (or 31876431 counting only the distinct ones).

The product of its (nonzero) digits is 1800000, while the sum is 47.

The spelling of 155556651440 in words is "one hundred fifty-five billion, five hundred fifty-six million, six hundred fifty-one thousand, four hundred forty".