51517219604 has 12 divisors (see below), whose sum is σ = 90157687200. Its totient is φ = 25757880408.

The previous prime is 51517219603. The next prime is 51517219639. The reversal of 51517219604 is 40691271515.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51517219603) 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, 4064 + ... + 321015.

It is an arithmetic number, because the mean of its divisors is an integer number (7513140600).

Almost surely, 2^51517219604 is an apocalyptic number.

It is an amenable number.

51517219604 is a deficient number, since it is larger than the sum of its proper divisors (38640467596).

51517219604 is a wasteful number, since it uses less digits than its factorization.

51517219604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364702 (or 364700 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 41.

The spelling of 51517219604 in words is "fifty-one billion, five hundred seventeen million, two hundred nineteen thousand, six hundred four".