53700020581 has 2 divisors, whose sum is σ = 53700020582. Its totient is φ = 53700020580.

The previous prime is 53700020527. The next prime is 53700020617. The reversal of 53700020581 is 18502000735.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48254908900 + 5445111681 = 219670^2 + 73791^2 .

It is a cyclic number.

It is not a de Polignac number, because 53700020581 - 2⁹ = 53700020069 is a prime.

It is a super-2 number, since 2×53700020581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53700000581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26850010290 + 26850010291.

It is an arithmetic number, because the mean of its divisors is an integer number (26850010291).

Almost surely, 2^53700020581 is an apocalyptic number.

It is an amenable number.

53700020581 is a deficient number, since it is larger than the sum of its proper divisors (1).

53700020581 is an equidigital number, since it uses as much as digits as its factorization.

53700020581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 53700020581 in words is "fifty-three billion, seven hundred million, twenty thousand, five hundred eighty-one".