25126540216 has 8 divisors (see below), whose sum is σ = 47112262920. Its totient is φ = 12563270104.

The previous prime is 25126540193. The next prime is 25126540247. The reversal of 25126540216 is 61204562152.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×25126540216³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1570408756 + ... + 1570408771.

It is an arithmetic number, because the mean of its divisors is an integer number (5889032865).

Almost surely, 2^25126540216 is an apocalyptic number.

It is an amenable number.

25126540216 is a deficient number, since it is larger than the sum of its proper divisors (21985722704).

25126540216 is a wasteful number, since it uses less digits than its factorization.

25126540216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140817533 (or 3140817529 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 25126540216 in words is "twenty-five billion, one hundred twenty-six million, five hundred forty thousand, two hundred sixteen".