51605742604 has 48 divisors (see below), whose sum is σ = 102572538880. Its totient is φ = 22521084480.

The previous prime is 51605742599. The next prime is 51605742611. The reversal of 51605742604 is 40624750615.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466789 + ... + 566659.

Almost surely, 2^51605742604 is an apocalyptic number.

It is an amenable number.

51605742604 is a deficient number, since it is larger than the sum of its proper divisors (50966796276).

51605742604 is a wasteful number, since it uses less digits than its factorization.

51605742604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100430 (or 100428 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 51605742604 in words is "fifty-one billion, six hundred five million, seven hundred forty-two thousand, six hundred four".