400049925025 has 9 divisors (see below), whose sum is σ = 496065828531. Its totient is φ = 320037410040.

The previous prime is 400049925019. The next prime is 400049925031. The reversal of 400049925025 is 520529940004.

The square root of 400049925025 is 632495.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (400049925019) and next prime (400049925031).

It can be written as a sum of positive squares in only one way, i.e., 144017973009 + 256031952016 = 379497^2 + 505996^2 .

It is not a de Polignac number, because 400049925025 - 2³ = 400049925017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3099226 + ... + 3225724.

Almost surely, 2^400049925025 is an apocalyptic number.

400049925025 is the 632495-th square number.

400049925025 is the 316248-th centered octagonal number.

It is an amenable number.

400049925025 is a deficient number, since it is larger than the sum of its proper divisors (96015903506).

400049925025 is an frugal number, since it uses more digits than its factorization.

400049925025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253008 (or 126504 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 400049925025 in words is "four hundred billion, forty-nine million, nine hundred twenty-five thousand, twenty-five".