645246242534 has 16 divisors (see below), whose sum is σ = 1010142552672. Its totient is φ = 308537389248.

The previous prime is 645246242533. The next prime is 645246242567. The reversal of 645246242534 is 435242642546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645246242533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1087529 + ... + 1572644.

It is an arithmetic number, because the mean of its divisors is an integer number (63133909542).

Almost surely, 2^645246242534 is an apocalyptic number.

645246242534 is a deficient number, since it is larger than the sum of its proper divisors (364896310138).

645246242534 is a wasteful number, since it uses less digits than its factorization.

645246242534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665471.

The product of its digits is 5529600, while the sum is 47.

The spelling of 645246242534 in words is "six hundred forty-five billion, two hundred forty-six million, two hundred forty-two thousand, five hundred thirty-four".