155015615664 has 240 divisors, whose sum is σ = 534260930112. Its totient is φ = 40858877952.

The previous prime is 155015615663. The next prime is 155015615681. The reversal of 155015615664 is 466516510551.

155015615664 is a `hidden beast` number, since 15 + 5 + 0 + 15 + 61 + 566 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (155015615663) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36073164 + ... + 36077460.

Almost surely, 2^155015615664 is an apocalyptic number.

155015615664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155015615664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267130465056).

155015615664 is an abundant number, since it is smaller than the sum of its proper divisors (379245314448).

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

155015615664 is a wasteful number, since it uses less digits than its factorization.

155015615664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7084 (or 7075 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 45.

The spelling of 155015615664 in words is "one hundred fifty-five billion, fifteen million, six hundred fifteen thousand, six hundred sixty-four".