40020641525 has 6 divisors (see below), whose sum is σ = 49625595522. Its totient is φ = 32016513200.

The previous prime is 40020641513. The next prime is 40020641561. The reversal of 40020641525 is 52514602004.

40020641525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 8810825956 + 31209815569 = 93866^2 + 176663^2 .

It is not a de Polignac number, because 40020641525 - 2²⁴ = 40003864309 is a prime.

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 5 ways as a sum of consecutive naturals, for example, 800412806 + ... + 800412855.

It is an arithmetic number, because the mean of its divisors is an integer number (8270932587).

Almost surely, 2^40020641525 is an apocalyptic number.

It is an amenable number.

40020641525 is a deficient number, since it is larger than the sum of its proper divisors (9604953997).

40020641525 is a wasteful number, since it uses less digits than its factorization.

40020641525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600825671 (or 1600825666 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 40020641525 in words is "forty billion, twenty million, six hundred forty-one thousand, five hundred twenty-five".