620561151 has 24 divisors (see below), whose sum is σ = 1052109344. Its totient is φ = 345021120.

The previous prime is 620561143. The next prime is 620561177. The reversal of 620561151 is 151165026.

It is a happy number.

It is not a de Polignac number, because 620561151 - 2³ = 620561143 is a prime.

It is a super-2 number, since 2×620561151² = 770192284260889602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620561141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130780 + ... + 135441.

Almost surely, 2^620561151 is an apocalyptic number.

620561151 is a deficient number, since it is larger than the sum of its proper divisors (431548193).

620561151 is a wasteful number, since it uses less digits than its factorization.

620561151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266271 (or 266268 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 620561151 is about 24911.0648307133. The cubic root of 620561151 is about 852.9590758747.

The spelling of 620561151 in words is "six hundred twenty million, five hundred sixty-one thousand, one hundred fifty-one".