641265537 has 32 divisors (see below), whose sum is σ = 967449600. Its totient is φ = 374397120.

The previous prime is 641265511. The next prime is 641265557. The reversal of 641265537 is 735562146.

641265537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641265537 - 2¹⁵ = 641232769 is a prime.

It is a super-2 number, since 2×641265537² = 822442977887796738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641265495 and 641265504.

It is not an unprimeable number, because it can be changed into a prime (641265557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123214 + ... + 128312.

It is an arithmetic number, because the mean of its divisors is an integer number (30232800).

Almost surely, 2^641265537 is an apocalyptic number.

It is an amenable number.

641265537 is a deficient number, since it is larger than the sum of its proper divisors (326184063).

641265537 is a wasteful number, since it uses less digits than its factorization.

641265537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5253.

The product of its digits is 151200, while the sum is 39.

The square root of 641265537 is about 25323.2212998268. The cubic root of 641265537 is about 862.3415263558.

The spelling of 641265537 in words is "six hundred forty-one million, two hundred sixty-five thousand, five hundred thirty-seven".