25140025137640 has 64 divisors (see below), whose sum is σ = 64928075068800. Its totient is φ = 8581797704448.

The previous prime is 25140025137607. The next prime is 25140025137679. The reversal of 25140025137640 is 4673152004152.

It is a super-2 number, since 2×25140025137640² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 25140025137593 and 25140025137602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195974754 + ... + 196102993.

It is an arithmetic number, because the mean of its divisors is an integer number (1014501172950).

Almost surely, 2^{25140025137640} is an apocalyptic number.

25140025137640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25140025137640 is an abundant number, since it is smaller than the sum of its proper divisors (39788049931160).

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

25140025137640 is a wasteful number, since it uses less digits than its factorization.

25140025137640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392077994 (or 392077990 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 25140025137640 in words is "twenty-five trillion, one hundred forty billion, twenty-five million, one hundred thirty-seven thousand, six hundred forty".