421676572651 has 4 divisors (see below), whose sum is σ = 421683995304. Its totient is φ = 421669150000.

The previous prime is 421676572643. The next prime is 421676572657. The reversal of 421676572651 is 156275676124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421676572651 - 2³ = 421676572643 is a prime.

It is a super-2 number, since 2×421676572651² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421676572657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3625450 + ... + 3739951.

It is an arithmetic number, because the mean of its divisors is an integer number (105420998826).

Almost surely, 2^421676572651 is an apocalyptic number.

421676572651 is a deficient number, since it is larger than the sum of its proper divisors (7422653).

421676572651 is an equidigital number, since it uses as much as digits as its factorization.

421676572651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7422652.

The product of its digits is 4233600, while the sum is 52.

The spelling of 421676572651 in words is "four hundred twenty-one billion, six hundred seventy-six million, five hundred seventy-two thousand, six hundred fifty-one".