25091440916 has 24 divisors (see below), whose sum is σ = 44059873536. Its totient is φ = 12502945280.

The previous prime is 25091440901. The next prime is 25091440931. The reversal of 25091440916 is 61904419052.

It is an interprime number because it is at equal distance from previous prime (25091440901) and next prime (25091440931).

It is a super-2 number, since 2×25091440916² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3592820 + ... + 3599796.

It is an arithmetic number, because the mean of its divisors is an integer number (1835828064).

Almost surely, 2^25091440916 is an apocalyptic number.

It is an amenable number.

25091440916 is a deficient number, since it is larger than the sum of its proper divisors (18968432620).

25091440916 is a wasteful number, since it uses less digits than its factorization.

25091440916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9919 (or 9917 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

Adding to 25091440916 its reverse (61904419052), we get a palindrome (86995859968).

The spelling of 25091440916 in words is "twenty-five billion, ninety-one million, four hundred forty thousand, nine hundred sixteen".