400000000025 has 12 divisors (see below), whose sum is σ = 496037931600. Its totient is φ = 319975528080.

The previous prime is 400000000019. The next prime is 400000000061. The reversal of 400000000025 is 520000000004.

It is a sliding number, since 400000000025 = 25 + 400000000000 and 1/25 + 1/400000000000 = 0.0400000000025.

It is not a de Polignac number, because 400000000025 - 2⁶ = 399999999961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399999999934 and 400000000015.

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, 274715 + ... + 935664.

It is an arithmetic number, because the mean of its divisors is an integer number (41336494300).

Almost surely, 2^400000000025 is an apocalyptic number.

It is an amenable number.

400000000025 is a deficient number, since it is larger than the sum of its proper divisors (96037931575).

400000000025 is a wasteful number, since it uses less digits than its factorization.

400000000025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223608 (or 1223603 counting only the distinct ones).

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

Adding to 400000000025 its reverse (520000000004), we get a palindrome (920000000029).

It can be divided in two parts, 4000000000 and 25, that multiplied together give a 11-th power (100000000000 = 10¹¹).

The spelling of 400000000025 in words is "four hundred billion, twenty-five", and thus it is an aban number.