51148193004 has 36 divisors (see below), whose sum is σ = 129327145584. Its totient is φ = 17044666272.

The previous prime is 51148193003. The next prime is 51148193039. The reversal of 51148193004 is 40039184115.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×51148193004² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51148193004.

It is not an unprimeable number, because it can be changed into a prime (51148193003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64392 + ... + 326255.

Almost surely, 2^51148193004 is an apocalyptic number.

It is an amenable number.

51148193004 is an abundant number, since it is smaller than the sum of its proper divisors (78178952580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51148193004 is a wasteful number, since it uses less digits than its factorization.

51148193004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394294 (or 394289 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 51148193004 in words is "fifty-one billion, one hundred forty-eight million, one hundred ninety-three thousand, four".