623891247820 has 12 divisors (see below), whose sum is σ = 1310171620464. Its totient is φ = 249556499120.

The previous prime is 623891247817. The next prime is 623891247851. The reversal of 623891247820 is 28742198326.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15597281176 + ... + 15597281215.

It is an arithmetic number, because the mean of its divisors is an integer number (109180968372).

Almost surely, 2^623891247820 is an apocalyptic number.

It is an amenable number.

623891247820 is an abundant number, since it is smaller than the sum of its proper divisors (686280372644).

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

623891247820 is a wasteful number, since it uses less digits than its factorization.

623891247820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31194562400 (or 31194562398 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 623891247820 in words is "six hundred twenty-three billion, eight hundred ninety-one million, two hundred forty-seven thousand, eight hundred twenty".