25372157778 has 48 divisors (see below), whose sum is σ = 61591398336. Its totient is φ = 7480732320.

The previous prime is 25372157777. The next prime is 25372157801. The reversal of 25372157778 is 87775127352.

It is not an unprimeable number, because it can be changed into a prime (25372157777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1724326 + ... + 1738977.

It is an arithmetic number, because the mean of its divisors is an integer number (1283154132).

Almost surely, 2^25372157778 is an apocalyptic number.

25372157778 is an abundant number, since it is smaller than the sum of its proper divisors (36219240558).

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

25372157778 is a wasteful number, since it uses less digits than its factorization.

25372157778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463359 (or 3463356 counting only the distinct ones).

The product of its digits is 5762400, while the sum is 54.

The spelling of 25372157778 in words is "twenty-five billion, three hundred seventy-two million, one hundred fifty-seven thousand, seven hundred seventy-eight".