421653430762561 has 16 divisors (see below), whose sum is σ = 447448123389888. Its totient is φ = 395969207603200.

The previous prime is 421653430762547. The next prime is 421653430762579. The reversal of 421653430762561 is 165267034356124.

It is a de Polignac number, because none of the positive numbers 2^k-421653430762561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421653430762061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40773906 + ... + 50058148.

It is an arithmetic number, because the mean of its divisors is an integer number (27965507711868).

Almost surely, 2^{421653430762561} is an apocalyptic number.

It is an amenable number.

421653430762561 is a deficient number, since it is larger than the sum of its proper divisors (25794692627327).

421653430762561 is a wasteful number, since it uses less digits than its factorization.

421653430762561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9290192.

The product of its (nonzero) digits is 21772800, while the sum is 55.

The spelling of 421653430762561 in words is "four hundred twenty-one trillion, six hundred fifty-three billion, four hundred thirty million, seven hundred sixty-two thousand, five hundred sixty-one".