155386015540 has 24 divisors (see below), whose sum is σ = 372926437632. Its totient is φ = 53275205280.

The previous prime is 155386015523. The next prime is 155386015549. The reversal of 155386015540 is 45510683551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155386015549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554949916 + ... + 554950195.

It is an arithmetic number, because the mean of its divisors is an integer number (15538601568).

Almost surely, 2^155386015540 is an apocalyptic number.

155386015540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155386015540 is an abundant number, since it is smaller than the sum of its proper divisors (217540422092).

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

155386015540 is a wasteful number, since it uses less digits than its factorization.

155386015540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109900127 (or 1109900125 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 43.

The spelling of 155386015540 in words is "one hundred fifty-five billion, three hundred eighty-six million, fifteen thousand, five hundred forty".