421751801970 has 80 divisors (see below), whose sum is σ = 1141267286808. Its totient is φ = 111750762240.

The previous prime is 421751801969. The next prime is 421751801981. The reversal of 421751801970 is 79108157124.

It is a happy number.

421751801970 is a `hidden beast` number, since 42 + 1 + 7 + 518 + 0 + 1 + 97 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 406930443921 + 14821358049 = 637911^2 + 121743^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1531051 + ... + 1785390.

Almost surely, 2^421751801970 is an apocalyptic number.

421751801970 is an abundant number, since it is smaller than the sum of its proper divisors (719515484838).

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

421751801970 is a wasteful number, since it uses less digits than its factorization.

421751801970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316617 (or 3316608 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The spelling of 421751801970 in words is "four hundred twenty-one billion, seven hundred fifty-one million, eight hundred one thousand, nine hundred seventy".