40642640125 has 8 divisors (see below), whose sum is σ = 50722015032. Its totient is φ = 32514112000.

The previous prime is 40642640089. The next prime is 40642640131. The reversal of 40642640125 is 52104624604.

It can be written as a sum of positive squares in 4 ways, for example, as 239228089 + 40403412036 = 15467^2 + 201006^2 .

It is not a de Polignac number, because 40642640125 - 2¹¹ = 40642638077 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 7 ways as a sum of consecutive naturals, for example, 162570436 + ... + 162570685.

It is an arithmetic number, because the mean of its divisors is an integer number (6340251879).

Almost surely, 2^40642640125 is an apocalyptic number.

It is an amenable number.

40642640125 is a deficient number, since it is larger than the sum of its proper divisors (10079374907).

40642640125 is an equidigital number, since it uses as much as digits as its factorization.

40642640125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325141136 (or 325141126 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

The spelling of 40642640125 in words is "forty billion, six hundred forty-two million, six hundred forty thousand, one hundred twenty-five".