1551501055500 has 96 divisors (see below), whose sum is σ = 4928695769088. Its totient is φ = 376121464000.

The previous prime is 1551501055499. The next prime is 1551501055501. The reversal of 1551501055500 is 55501051551.

It is an interprime number because it is at equal distance from previous prime (1551501055499) and next prime (1551501055501).

It is a super-2 number, since 2×1551501055500² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1551501055501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46998684 + ... + 47031683.

It is an arithmetic number, because the mean of its divisors is an integer number (51340580928).

Almost surely, 2^{1551501055500} is an apocalyptic number.

1551501055500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1551501055500 is an abundant number, since it is smaller than the sum of its proper divisors (3377194713588).

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

1551501055500 is a wasteful number, since it uses less digits than its factorization.

1551501055500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94030400 (or 94030388 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 33.

The spelling of 1551501055500 in words is "one trillion, five hundred fifty-one billion, five hundred one million, fifty-five thousand, five hundred".