70395221581 has 8 divisors (see below), whose sum is σ = 70582167864. Its totient is φ = 70208332800.

The previous prime is 70395221551. The next prime is 70395221593. The reversal of 70395221581 is 18512259307.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28752289225 + 41642932356 = 169565^2 + 204066^2 .

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 70395221581 - 2⁵ = 70395221549 is a prime.

It is a super-2 number, since 2×70395221581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70395221551) 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, 3654331 + ... + 3673543.

It is an arithmetic number, because the mean of its divisors is an integer number (8822770983).

Almost surely, 2^70395221581 is an apocalyptic number.

It is an amenable number.

70395221581 is a deficient number, since it is larger than the sum of its proper divisors (186946283).

70395221581 is a wasteful number, since it uses less digits than its factorization.

70395221581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28751.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 70395221581 in words is "seventy billion, three hundred ninety-five million, two hundred twenty-one thousand, five hundred eighty-one".