421996991616 has 128 divisors (see below), whose sum is σ = 1318740782400. Its totient is φ = 132391194624.

The previous prime is 421996991573. The next prime is 421996991623. The reversal of 421996991616 is 616199699124.

421996991616 is a `hidden beast` number, since 4 + 2 + 1 + 9 + 9 + 6 + 9 + 9 + 1 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a nude number because it is divisible by every one of its digits.

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, 3532590 + ... + 3650093.

Almost surely, 2^421996991616 is an apocalyptic number.

It is an amenable number.

421996991616 is an abundant number, since it is smaller than the sum of its proper divisors (896743790784).

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

421996991616 is a wasteful number, since it uses less digits than its factorization.

421996991616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7182723 (or 7182705 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 63.

The spelling of 421996991616 in words is "four hundred twenty-one billion, nine hundred ninety-six million, nine hundred ninety-one thousand, six hundred sixteen".