657624531041 has 4 divisors (see below), whose sum is σ = 657630327300. Its totient is φ = 657618734784.

The previous prime is 657624531017. The next prime is 657624531059. The reversal of 657624531041 is 140135426756.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 636917321041 + 20707210000 = 798071^2 + 143900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-657624531041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 657624530983 and 657624531001.

It is not an unprimeable number, because it can be changed into a prime (657624531061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2724476 + ... + 2956013.

It is an arithmetic number, because the mean of its divisors is an integer number (164407581825).

Almost surely, 2^657624531041 is an apocalyptic number.

It is an amenable number.

657624531041 is a deficient number, since it is larger than the sum of its proper divisors (5796259).

657624531041 is a wasteful number, since it uses less digits than its factorization.

657624531041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5796258.

The product of its (nonzero) digits is 604800, while the sum is 44.

Adding to 657624531041 its reverse (140135426756), we get a palindrome (797759957797).

The spelling of 657624531041 in words is "six hundred fifty-seven billion, six hundred twenty-four million, five hundred thirty-one thousand, forty-one".