70517715620551 has 4 divisors (see below), whose sum is σ = 70522302750712. Its totient is φ = 70513128490392.

The previous prime is 70517715620537. The next prime is 70517715620563. The reversal of 70517715620551 is 15502651771507.

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

It is a cyclic number.

It is not a de Polignac number, because 70517715620551 - 2⁵ = 70517715620519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70517715629551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2293542021 + ... + 2293572766.

It is an arithmetic number, because the mean of its divisors is an integer number (17630575687678).

Almost surely, 2^{70517715620551} is an apocalyptic number.

70517715620551 is a deficient number, since it is larger than the sum of its proper divisors (4587130161).

70517715620551 is a wasteful number, since it uses less digits than its factorization.

70517715620551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587130160.

The product of its (nonzero) digits is 2572500, while the sum is 52.

The spelling of 70517715620551 in words is "seventy trillion, five hundred seventeen billion, seven hundred fifteen million, six hundred twenty thousand, five hundred fifty-one".