40021137727525 has 12 divisors (see below), whose sum is σ = 49664473128292. Its totient is φ = 31992224797440.

The previous prime is 40021137727457. The next prime is 40021137727541. The reversal of 40021137727525 is 52572773112004.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 12290023638369 + 27731114089156 = 3505713^2 + 5266034^2 .

It is not a de Polignac number, because 40021137727525 - 2²³ = 40021129338917 is a prime.

It is a super-2 number, since 2×40021137727525² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 617101542 + ... + 617166391.

Almost surely, 2^{40021137727525} is an apocalyptic number.

It is an amenable number.

40021137727525 is a deficient number, since it is larger than the sum of its proper divisors (9643335400767).

40021137727525 is a wasteful number, since it uses less digits than its factorization.

40021137727525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234269240 (or 1234269235 counting only the distinct ones).

The product of its (nonzero) digits is 823200, while the sum is 46.

The spelling of 40021137727525 in words is "forty trillion, twenty-one billion, one hundred thirty-seven million, seven hundred twenty-seven thousand, five hundred twenty-five".