51507470494 has 4 divisors (see below), whose sum is σ = 77261205744. Its totient is φ = 25753735246.

The previous prime is 51507470473. The next prime is 51507470537. The reversal of 51507470494 is 49407470515.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12876867622 + ... + 12876867625.

It is an arithmetic number, because the mean of its divisors is an integer number (19315301436).

Almost surely, 2^51507470494 is an apocalyptic number.

51507470494 is a deficient number, since it is larger than the sum of its proper divisors (25753735250).

51507470494 is a wasteful number, since it uses less digits than its factorization.

51507470494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25753735249.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 51507470494 in words is "fifty-one billion, five hundred seven million, four hundred seventy thousand, four hundred ninety-four".