51466911939 has 12 divisors (see below), whose sum is σ = 75035873016. Its totient is φ = 33990607872.

The previous prime is 51466911857. The next prime is 51466912001. The reversal of 51466911939 is 93911966415.

It is a happy number.

51466911939 is a `hidden beast` number, since 5 + 1 + 466 + 91 + 1 + 93 + 9 = 666.

It is not a de Polignac number, because 51466911939 - 2⁹ = 51466911427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51466918939) 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, 26721214 + ... + 26723139.

It is an arithmetic number, because the mean of its divisors is an integer number (6252989418).

Almost surely, 2^51466911939 is an apocalyptic number.

51466911939 is a deficient number, since it is larger than the sum of its proper divisors (23568961077).

51466911939 is a wasteful number, since it uses less digits than its factorization.

51466911939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53444466 (or 53444463 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 54.

The spelling of 51466911939 in words is "fifty-one billion, four hundred sixty-six million, nine hundred eleven thousand, nine hundred thirty-nine".