400072442465 has 16 divisors (see below), whose sum is σ = 480619074000. Its totient is φ = 319703334912.

The previous prime is 400072442431. The next prime is 400072442501. The reversal of 400072442465 is 564244270004.

It can be written as a sum of positive squares in 8 ways, for example, as 106829615104 + 293242827361 = 326848^2 + 541519^2 .

It is a cyclic number.

It is not a de Polignac number, because 400072442465 - 2¹⁴ = 400072426081 is a prime.

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, 44207261 + ... + 44216309.

It is an arithmetic number, because the mean of its divisors is an integer number (30038692125).

Almost surely, 2^400072442465 is an apocalyptic number.

It is an amenable number.

400072442465 is a deficient number, since it is larger than the sum of its proper divisors (80546631535).

400072442465 is a wasteful number, since it uses less digits than its factorization.

400072442465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17876.

The product of its (nonzero) digits is 215040, while the sum is 38.

The spelling of 400072442465 in words is "four hundred billion, seventy-two million, four hundred forty-two thousand, four hundred sixty-five".