551626025640 has 64 divisors (see below), whose sum is σ = 1655991509760. Its totient is φ = 147001301760.

The previous prime is 551626025569. The next prime is 551626025641. The reversal of 551626025640 is 46520626155.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 551626025592 and 551626025601.

It is not an unprimeable number, because it can be changed into a prime (551626025641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1367251 + ... + 1724130.

It is an arithmetic number, because the mean of its divisors is an integer number (25874867340).

Almost surely, 2^551626025640 is an apocalyptic number.

It is an amenable number.

551626025640 is an abundant number, since it is smaller than the sum of its proper divisors (1104365484120).

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

551626025640 is a wasteful number, since it uses less digits than its factorization.

551626025640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3092882 (or 3092878 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 551626025640 in words is "five hundred fifty-one billion, six hundred twenty-six million, twenty-five thousand, six hundred forty".