551459640 has 64 divisors (see below), whose sum is σ = 1656345600. Its totient is φ = 146881152.

The previous prime is 551459639. The next prime is 551459641. The reversal of 551459640 is 46954155.

551459640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (551459639) and next prime (551459641).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551459641) 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, 122469 + ... + 126891.

It is an arithmetic number, because the mean of its divisors is an integer number (25880400).

Almost surely, 2^551459640 is an apocalyptic number.

It is an amenable number.

551459640 is an abundant number, since it is smaller than the sum of its proper divisors (1104885960).

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

551459640 is a wasteful number, since it uses less digits than its factorization.

551459640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5476 (or 5472 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 551459640 is about 23483.1778088060. The cubic root of 551459640 is about 820.0454267913.

The spelling of 551459640 in words is "five hundred fifty-one million, four hundred fifty-nine thousand, six hundred forty".