801237421818 has 24 divisors (see below), whose sum is σ = 1827383594400. Its totient is φ = 253022343624.

The previous prime is 801237421813. The next prime is 801237421841. The reversal of 801237421818 is 818124732108.

It is a super-2 number, since 2×801237421818² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (801237421811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1171399398 + ... + 1171400081.

It is an arithmetic number, because the mean of its divisors is an integer number (76140983100).

Almost surely, 2^801237421818 is an apocalyptic number.

801237421818 is an abundant number, since it is smaller than the sum of its proper divisors (1026146172582).

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

801237421818 is a wasteful number, since it uses less digits than its factorization.

801237421818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342799506 (or 2342799503 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The spelling of 801237421818 in words is "eight hundred one billion, two hundred thirty-seven million, four hundred twenty-one thousand, eight hundred eighteen".