51504123004 has 12 divisors (see below), whose sum is σ = 94876016200. Its totient is φ = 24396689808.

The previous prime is 51504122953. The next prime is 51504123017. The reversal of 51504123004 is 40032140515.

It is a happy number.

It is a super-2 number, since 2×51504123004² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51504123004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338842839 + ... + 338842990.

Almost surely, 2^51504123004 is an apocalyptic number.

It is an amenable number.

51504123004 is a deficient number, since it is larger than the sum of its proper divisors (43371893196).

51504123004 is a wasteful number, since it uses less digits than its factorization.

51504123004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677685852 (or 677685850 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 51504123004 its reverse (40032140515), we get a palindrome (91536263519).

The spelling of 51504123004 in words is "fifty-one billion, five hundred four million, one hundred twenty-three thousand, four".