155511666080 has 48 divisors (see below), whose sum is σ = 367939250280. Its totient is φ = 62112740352.

The previous prime is 155511666077. The next prime is 155511666083. The reversal of 155511666080 is 80666115551.

It is an interprime number because it is at equal distance from previous prime (155511666077) and next prime (155511666083).

It can be written as a sum of positive squares in 4 ways, for example, as 155321115664 + 190550416 = 394108^2 + 13804^2 .

It is not an unprimeable number, because it can be changed into a prime (155511666083) 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, 609515 + ... + 826154.

Almost surely, 2^155511666080 is an apocalyptic number.

155511666080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155511666080 is an abundant number, since it is smaller than the sum of its proper divisors (212427584200).

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

155511666080 is a wasteful number, since it uses less digits than its factorization.

155511666080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436361 (or 1436353 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 44.

The spelling of 155511666080 in words is "one hundred fifty-five billion, five hundred eleven million, six hundred sixty-six thousand, eighty".