620845505955 has 24 divisors (see below), whose sum is σ = 1079637550992. Its totient is φ = 330039036864.

The previous prime is 620845505927. The next prime is 620845505963. The reversal of 620845505955 is 559505548026.

It is a happy number.

620845505955 is a `hidden beast` number, since 6 + 2 + 0 + 8 + 45 + 5 + 0 + 595 + 5 = 666.

It is not a de Polignac number, because 620845505955 - 2¹⁵ = 620845473187 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22456164 + ... + 22483793.

It is an arithmetic number, because the mean of its divisors is an integer number (44984897958).

Almost surely, 2^620845505955 is an apocalyptic number.

620845505955 is a deficient number, since it is larger than the sum of its proper divisors (458792045037).

620845505955 is a wasteful number, since it uses less digits than its factorization.

620845505955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44940275 (or 44940272 counting only the distinct ones).

The product of its (nonzero) digits is 10800000, while the sum is 54.

The spelling of 620845505955 in words is "six hundred twenty billion, eight hundred forty-five million, five hundred five thousand, nine hundred fifty-five".