400347366642 has 40 divisors (see below), whose sum is σ = 926012558592. Its totient is φ = 129144310200.

The previous prime is 400347366641. The next prime is 400347366721. The reversal of 400347366642 is 246663743004.

It is not an unprimeable number, because it can be changed into a prime (400347366641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39854334 + ... + 39864377.

Almost surely, 2^400347366642 is an apocalyptic number.

400347366642 is an abundant number, since it is smaller than the sum of its proper divisors (525665191950).

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

400347366642 is a wasteful number, since it uses less digits than its factorization.

400347366642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79718756 (or 79718747 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 45.

The spelling of 400347366642 in words is "four hundred billion, three hundred forty-seven million, three hundred sixty-six thousand, six hundred forty-two".