101555420520 has 64 divisors (see below), whose sum is σ = 304974051840. Its totient is φ = 27054086400.

The previous prime is 101555420503. The next prime is 101555420531. The reversal of 101555420520 is 25024555101.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308071 + ... + 545910.

It is an arithmetic number, because the mean of its divisors is an integer number (4765219560).

Almost surely, 2^101555420520 is an apocalyptic number.

101555420520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101555420520 is an abundant number, since it is smaller than the sum of its proper divisors (203418631320).

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

101555420520 is a wasteful number, since it uses less digits than its factorization.

101555420520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854986 (or 854982 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 101555420520 its reverse (25024555101), we get a palindrome (126579975621).

The spelling of 101555420520 in words is "one hundred one billion, five hundred fifty-five million, four hundred twenty thousand, five hundred twenty".