620905623984 has 40 divisors (see below), whose sum is σ = 1782229107120. Its totient is φ = 206968541184.

The previous prime is 620905623977. The next prime is 620905624013. The reversal of 620905623984 is 489326509026.

It is a happy number.

620905623984 is a `hidden beast` number, since 6 + 2 + 0 + 9 + 0 + 5 + 623 + 9 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 620905623984.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 718640337 + ... + 718641200.

It is an arithmetic number, because the mean of its divisors is an integer number (44555727678).

Almost surely, 2^620905623984 is an apocalyptic number.

It is an amenable number.

620905623984 is an abundant number, since it is smaller than the sum of its proper divisors (1161323483136).

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

620905623984 is a wasteful number, since it uses less digits than its factorization.

620905623984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437281554 (or 1437281542 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 620905623984 in words is "six hundred twenty billion, nine hundred five million, six hundred twenty-three thousand, nine hundred eighty-four".