70521690557 has 8 divisors (see below), whose sum is σ = 76125363840. Its totient is φ = 65129476720.

The previous prime is 70521690539. The next prime is 70521690559. The reversal of 70521690557 is 75509612507.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70521690557 - 2⁶ = 70521690493 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 (70521690559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52864169 + ... + 52865502.

It is an arithmetic number, because the mean of its divisors is an integer number (9515670480).

Almost surely, 2^70521690557 is an apocalyptic number.

It is an amenable number.

70521690557 is a deficient number, since it is larger than the sum of its proper divisors (5603673283).

70521690557 is a wasteful number, since it uses less digits than its factorization.

70521690557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105729723.

The product of its (nonzero) digits is 661500, while the sum is 47.

The spelling of 70521690557 in words is "seventy billion, five hundred twenty-one million, six hundred ninety thousand, five hundred fifty-seven".