40000000025 has 12 divisors (see below), whose sum is σ = 49626315900. Its totient is φ = 31983022080.

The previous prime is 40000000003. The next prime is 40000000031. The reversal of 40000000025 is 52000000004.

It can be written as a sum of positive squares in 6 ways, for example, as 1018631056 + 38981368969 = 31916^2 + 197437^2 .

It is a sliding number, since 40000000025 = 25 + 40000000000 and 1/25 + 1/40000000000 = 0.040000000025.

It is not a de Polignac number, because 40000000025 - 2⁶ = 39999999961 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39999999943 and 40000000015.

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, 376280 + ... + 470729.

It is an arithmetic number, because the mean of its divisors is an integer number (4135526325).

Almost surely, 2^40000000025 is an apocalyptic number.

It is an amenable number.

40000000025 is a deficient number, since it is larger than the sum of its proper divisors (9626315875).

40000000025 is a wasteful number, since it uses less digits than its factorization.

40000000025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848908 (or 848903 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

Adding to 40000000025 its reverse (52000000004), we get a palindrome (92000000029).

It can be divided in two parts, 400000000 and 25, that multiplied together give a 10-th power (10000000000 = 10¹⁰).

The spelling of 40000000025 in words is "forty billion, twenty-five", and thus it is an aban number and an uban number.