25097920378 has 4 divisors (see below), whose sum is σ = 37646880570. Its totient is φ = 12548960188.

The previous prime is 25097920357. The next prime is 25097920387. The reversal of 25097920378 is 87302979052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22451126569 + 2646793809 = 149837^2 + 51447^2 .

It is a super-3 number, since 3×25097920378³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6274480093 + ... + 6274480096.

Almost surely, 2^25097920378 is an apocalyptic number.

25097920378 is a deficient number, since it is larger than the sum of its proper divisors (12548960192).

25097920378 is a wasteful number, since it uses less digits than its factorization.

25097920378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12548960191.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 25097920378 in words is "twenty-five billion, ninety-seven million, nine hundred twenty thousand, three hundred seventy-eight".