70402131557 has 2 divisors, whose sum is σ = 70402131558. Its totient is φ = 70402131556.

The previous prime is 70402131529. The next prime is 70402131577. The reversal of 70402131557 is 75513120407.

It is a Cunningham number, because it is equal to 265334²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70402131556 + 1 = 265334^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 70402131557 - 2¹⁸ = 70401869413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70402131577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35201065778 + 35201065779.

It is an arithmetic number, because the mean of its divisors is an integer number (35201065779).

Almost surely, 2^70402131557 is an apocalyptic number.

It is an amenable number.

70402131557 is a deficient number, since it is larger than the sum of its proper divisors (1).

70402131557 is an equidigital number, since it uses as much as digits as its factorization.

70402131557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29400, while the sum is 35.

The spelling of 70402131557 in words is "seventy billion, four hundred two million, one hundred thirty-one thousand, five hundred fifty-seven".