801650844978840 has 48 divisors (see below), whose sum is σ = 2605365246182400. Its totient is φ = 213773558660928.

The previous prime is 801650844978827. The next prime is 801650844979001. The reversal of 801650844978840 is 48879448056108.

It is a happy number.

801650844978840 is a `hidden beast` number, since 8 + 0 + 1 + 6 + 50 + 8 + 4 + 497 + 8 + 84 + 0 = 666.

It is a super-2 number, since 2×801650844978840² (a number of 31 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1113403951000 + ... + 1113403951719.

It is an arithmetic number, because the mean of its divisors is an integer number (54278442628800).

Almost surely, 2^{801650844978840} is an apocalyptic number.

It is an amenable number.

801650844978840 is an abundant number, since it is smaller than the sum of its proper divisors (1803714401203560).

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

801650844978840 is a wasteful number, since it uses less digits than its factorization.

801650844978840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226807902736 (or 2226807902729 counting only the distinct ones).

The product of its (nonzero) digits is 495452160, while the sum is 72.

The spelling of 801650844978840 in words is "eight hundred one trillion, six hundred fifty billion, eight hundred forty-four million, nine hundred seventy-eight thousand, eight hundred forty".