15625000004 has 12 divisors (see below), whose sum is σ = 27403586364. Its totient is φ = 7795403904.

The previous prime is 15624999983. The next prime is 15625000007. The reversal of 15625000004 is 40000052651.

It can be written as a sum of positive squares in 2 ways, for example, as 13513597504 + 2111402500 = 116248^2 + 45950^2 .

It is not an unprimeable number, because it can be changed into a prime (15625000007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4271969 + ... + 4275624.

It is an arithmetic number, because the mean of its divisors is an integer number (2283632197).

Almost surely, 2^15625000004 is an apocalyptic number.

It is an amenable number.

15625000004 is a deficient number, since it is larger than the sum of its proper divisors (11778586360).

15625000004 is a wasteful number, since it uses less digits than its factorization.

15625000004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8548054 (or 8548052 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 15625000004 its reverse (40000052651), we get a palindrome (55625052655).

The spelling of 15625000004 in words is "fifteen billion, six hundred twenty-five million, four", and thus it is an aban number.