51613278447578 has 16 divisors (see below), whose sum is σ = 77870705028480. Its totient is φ = 25656389313456.

The previous prime is 51613278447527. The next prime is 51613278447659. The reversal of 51613278447578 is 87574487231615.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5138651 + ... + 11385617.

It is an arithmetic number, because the mean of its divisors is an integer number (4866919064280).

Almost surely, 2^{51613278447578} is an apocalyptic number.

51613278447578 is a deficient number, since it is larger than the sum of its proper divisors (26257426580902).

51613278447578 is a wasteful number, since it uses less digits than its factorization.

51613278447578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6271021.

The product of its digits is 316108800, while the sum is 68.

The spelling of 51613278447578 in words is "fifty-one trillion, six hundred thirteen billion, two hundred seventy-eight million, four hundred forty-seven thousand, five hundred seventy-eight".