70045756621 has 2 divisors, whose sum is σ = 70045756622. Its totient is φ = 70045756620.

The previous prime is 70045756607. The next prime is 70045756631. The reversal of 70045756621 is 12665754007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46364855625 + 23680900996 = 215325^2 + 153886^2 .

It is a cyclic number.

It is not a de Polignac number, because 70045756621 - 2⁵ = 70045756589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70045756631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35022878310 + 35022878311.

It is an arithmetic number, because the mean of its divisors is an integer number (35022878311).

Almost surely, 2^70045756621 is an apocalyptic number.

It is an amenable number.

70045756621 is a deficient number, since it is larger than the sum of its proper divisors (1).

70045756621 is an equidigital number, since it uses as much as digits as its factorization.

70045756621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 70045756621 in words is "seventy billion, forty-five million, seven hundred fifty-six thousand, six hundred twenty-one".