400642464044 has 12 divisors (see below), whose sum is σ = 738025591800. Its totient is φ = 189778009248.

The previous prime is 400642464029. The next prime is 400642464059. The reversal of 400642464044 is 440464246004.

It is an interprime number because it is at equal distance from previous prime (400642464029) and next prime (400642464059).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 400642463989 and 400642464007.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2635805609 + ... + 2635805760.

It is an arithmetic number, because the mean of its divisors is an integer number (61502132650).

Almost surely, 2^400642464044 is an apocalyptic number.

It is an amenable number.

400642464044 is a deficient number, since it is larger than the sum of its proper divisors (337383127756).

400642464044 is a wasteful number, since it uses less digits than its factorization.

400642464044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5271611392 (or 5271611390 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 38.

The spelling of 400642464044 in words is "four hundred billion, six hundred forty-two million, four hundred sixty-four thousand, forty-four".