421566400738 has 16 divisors (see below), whose sum is σ = 760721325120. Its totient is φ = 171162297936.

The previous prime is 421566400733. The next prime is 421566400763. The reversal of 421566400738 is 837004665124.

It is not an unprimeable number, because it can be changed into a prime (421566400733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792417781 + ... + 792418312.

It is an arithmetic number, because the mean of its divisors is an integer number (47545082820).

Almost surely, 2^421566400738 is an apocalyptic number.

421566400738 is a deficient number, since it is larger than the sum of its proper divisors (339154924382).

421566400738 is a wasteful number, since it uses less digits than its factorization.

421566400738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584836121.

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 421566400738 in words is "four hundred twenty-one billion, five hundred sixty-six million, four hundred thousand, seven hundred thirty-eight".