25242156144 has 80 divisors (see below), whose sum is σ = 73995978240. Its totient is φ = 8235023040.

The previous prime is 25242156113. The next prime is 25242156157. The reversal of 25242156144 is 44165124252.

25242156144 is a `hidden beast` number, since 2 + 5 + 24 + 2 + 15 + 614 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25242156099 and 25242156108.

It is a congruent number.

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, 601302 + ... + 641909.

It is an arithmetic number, because the mean of its divisors is an integer number (924949728).

Almost surely, 2^25242156144 is an apocalyptic number.

25242156144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25242156144 is an abundant number, since it is smaller than the sum of its proper divisors (48753822096).

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

25242156144 is a wasteful number, since it uses less digits than its factorization.

25242156144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243275 (or 1243263 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The spelling of 25242156144 in words is "twenty-five billion, two hundred forty-two million, one hundred fifty-six thousand, one hundred forty-four".