551525401020 has 48 divisors (see below), whose sum is σ = 1684659408768. Its totient is φ = 133703127360.

The previous prime is 551525401019. The next prime is 551525401043. The reversal of 551525401020 is 20104525155.

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

It is a congruent number.

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, 417821614 + ... + 417822933.

It is an arithmetic number, because the mean of its divisors is an integer number (35097071016).

Almost surely, 2^551525401020 is an apocalyptic number.

It is an amenable number.

551525401020 is an abundant number, since it is smaller than the sum of its proper divisors (1133134007748).

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

551525401020 is a wasteful number, since it uses less digits than its factorization.

551525401020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835644570 (or 835644568 counting only the distinct ones).

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

Adding to 551525401020 its reverse (20104525155), we get a palindrome (571629926175).

The spelling of 551525401020 in words is "five hundred fifty-one billion, five hundred twenty-five million, four hundred one thousand, twenty".