25124779378 has 32 divisors (see below), whose sum is σ = 39033077760. Its totient is φ = 12121770960.

The previous prime is 25124779357. The next prime is 25124779403. The reversal of 25124779378 is 87397742152.

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, 6109543 + ... + 6113653.

It is an arithmetic number, because the mean of its divisors is an integer number (1219783680).

Almost surely, 2^25124779378 is an apocalyptic number.

25124779378 is a deficient number, since it is larger than the sum of its proper divisors (13908298382).

25124779378 is a wasteful number, since it uses less digits than its factorization.

25124779378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5062.

The product of its digits is 5927040, while the sum is 55.

It can be divided in two parts, 251247 and 79378, that added together give a square (330625 = 575²).

The spelling of 25124779378 in words is "twenty-five billion, one hundred twenty-four million, seven hundred seventy-nine thousand, three hundred seventy-eight".