51213269704 has 8 divisors (see below), whose sum is σ = 96024880710. Its totient is φ = 25606634848.

The previous prime is 51213269689. The next prime is 51213269713. The reversal of 51213269704 is 40796231215.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47481281604 + 3731988100 = 217902^2 + 61090^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200829349 + ... + 3200829364.

Almost surely, 2^51213269704 is an apocalyptic number.

It is an amenable number.

51213269704 is a deficient number, since it is larger than the sum of its proper divisors (44811611006).

51213269704 is a wasteful number, since it uses less digits than its factorization.

51213269704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401658719 (or 6401658715 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 51213269704 in words is "fifty-one billion, two hundred thirteen million, two hundred sixty-nine thousand, seven hundred four".