645264614541 has 32 divisors (see below), whose sum is σ = 871327670400. Its totient is φ = 424719832320.

The previous prime is 645264614539. The next prime is 645264614567. The reversal of 645264614541 is 145416462546.

It is not a de Polignac number, because 645264614541 - 2¹ = 645264614539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645264614531) 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, 121538995 + ... + 121544303.

It is an arithmetic number, because the mean of its divisors is an integer number (27228989700).

Almost surely, 2^645264614541 is an apocalyptic number.

It is an amenable number.

645264614541 is a deficient number, since it is larger than the sum of its proper divisors (226063055859).

645264614541 is a wasteful number, since it uses less digits than its factorization.

645264614541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6669.

The product of its digits is 2764800, while the sum is 48.

The spelling of 645264614541 in words is "six hundred forty-five billion, two hundred sixty-four million, six hundred fourteen thousand, five hundred forty-one".