400626242664 has 32 divisors (see below), whose sum is σ = 1001789389440. Its totient is φ = 133512243200.

The previous prime is 400626242657. The next prime is 400626242671. The reversal of 400626242664 is 466242626004.

It is an interprime number because it is at equal distance from previous prime (400626242657) and next prime (400626242671).

It is a super-2 number, since 2×400626242664² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1755072 + ... + 1970159.

It is an arithmetic number, because the mean of its divisors is an integer number (31305918420).

Almost surely, 2^400626242664 is an apocalyptic number.

It is an amenable number.

400626242664 is an abundant number, since it is smaller than the sum of its proper divisors (601163146776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400626242664 is a wasteful number, since it uses less digits than its factorization.

400626242664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729721 (or 3729717 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 42.

Adding to 400626242664 its reverse (466242626004), we get a palindrome (866868868668).

The spelling of 400626242664 in words is "four hundred billion, six hundred twenty-six million, two hundred forty-two thousand, six hundred sixty-four".