25715400205216 has 48 divisors (see below), whose sum is σ = 54531127173600. Its totient is φ = 11897700450048.

The previous prime is 25715400205193. The next prime is 25715400205217. The reversal of 25715400205216 is 61250200451752.

It is a happy number.

It is a super-2 number, since 2×25715400205216² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25715400205217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491776951 + ... + 491829238.

It is an arithmetic number, because the mean of its divisors is an integer number (1136065149450).

Almost surely, 2^{25715400205216} is an apocalyptic number.

It is an amenable number.

25715400205216 is an abundant number, since it is smaller than the sum of its proper divisors (28815726968384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25715400205216 is a wasteful number, since it uses less digits than its factorization.

25715400205216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983606261 (or 983606253 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 40.

Adding to 25715400205216 its reverse (61250200451752), we get a palindrome (86965600656968).

The spelling of 25715400205216 in words is "twenty-five trillion, seven hundred fifteen billion, four hundred million, two hundred five thousand, two hundred sixteen".