651380742840 has 64 divisors (see below), whose sum is σ = 1957135024800. Its totient is φ = 173435505152.

The previous prime is 651380742823. The next prime is 651380742847. The reversal of 651380742840 is 48247083156.

651380742840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×651380742840² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 651380742840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651380742847) 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, 4077975 + ... + 4234694.

Almost surely, 2^651380742840 is an apocalyptic number.

651380742840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

651380742840 is an abundant number, since it is smaller than the sum of its proper divisors (1305754281960).

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

651380742840 is a wasteful number, since it uses less digits than its factorization.

651380742840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8313336 (or 8313332 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 651380742840 in words is "six hundred fifty-one billion, three hundred eighty million, seven hundred forty-two thousand, eight hundred forty".