70657406393616 has 135 divisors (see below), whose sum is σ = 230029407872901. Its totient is φ = 20187628659072.

The previous prime is 70657406393611. The next prime is 70657406393641. The reversal of 70657406393616 is 61639360475607.

It is a happy number.

The square root of 70657406393616 is 8405796.

It is a perfect power (a square), and thus also a powerful number.

70657406393616 is a `hidden beast` number, since 7 + 0 + 6 + 5 + 7 + 4 + 0 + 6 + 3 + 9 + 3 + 616 = 666.

It can be written as a sum of positive squares in only one way, i.e., 59892182912016 + 10765223481600 = 7739004^2 + 3281040^2 .

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (70657406393611) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 706036830 + ... + 706136898.

Almost surely, 2^{70657406393616} is an apocalyptic number.

70657406393616 is the 8405796-th square number.

It is an amenable number.

70657406393616 is an abundant number, since it is smaller than the sum of its proper divisors (159372001479285).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70657406393616 is an frugal number, since it uses more digits than its factorization.

70657406393616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200166 (or 100081 counting only the distinct ones).

The product of its (nonzero) digits is 102876480, while the sum is 63.

The spelling of 70657406393616 in words is "seventy trillion, six hundred fifty-seven billion, four hundred six million, three hundred ninety-three thousand, six hundred sixteen".