35537625581 has 2 divisors, whose sum is σ = 35537625582. Its totient is φ = 35537625580.

The previous prime is 35537625547. The next prime is 35537625601. The reversal of 35537625581 is 18552673553.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35481749956 + 55875625 = 188366^2 + 7475^2 .

It is a cyclic number.

It is not a de Polignac number, because 35537625581 - 2³⁴ = 18357756397 is a prime.

It is a super-2 number, since 2×35537625581² (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 (35537925581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17768812790 + 17768812791.

It is an arithmetic number, because the mean of its divisors is an integer number (17768812791).

Almost surely, 2^35537625581 is an apocalyptic number.

It is an amenable number.

35537625581 is a deficient number, since it is larger than the sum of its proper divisors (1).

35537625581 is an equidigital number, since it uses as much as digits as its factorization.

35537625581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780000, while the sum is 50.

The spelling of 35537625581 in words is "thirty-five billion, five hundred thirty-seven million, six hundred twenty-five thousand, five hundred eighty-one".