53507403581 has 2 divisors, whose sum is σ = 53507403582. Its totient is φ = 53507403580.

The previous prime is 53507403541. The next prime is 53507403629. The reversal of 53507403581 is 18530470535.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49887456025 + 3619947556 = 223355^2 + 60166^2 .

It is a cyclic number.

It is not a de Polignac number, because 53507403581 - 2²⁶ = 53440294717 is a prime.

It is a super-2 number, since 2×53507403581² (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 (53507403541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26753701790 + 26753701791.

It is an arithmetic number, because the mean of its divisors is an integer number (26753701791).

Almost surely, 2^53507403581 is an apocalyptic number.

It is an amenable number.

53507403581 is a deficient number, since it is larger than the sum of its proper divisors (1).

53507403581 is an equidigital number, since it uses as much as digits as its factorization.

53507403581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 53507403581 in words is "fifty-three billion, five hundred seven million, four hundred three thousand, five hundred eighty-one".