421827752461 has 4 divisors (see below), whose sum is σ = 430802811072. Its totient is φ = 412852693852.

The previous prime is 421827752431. The next prime is 421827752491. The reversal of 421827752461 is 164257728124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (421827752431) and next prime (421827752491).

It is a cyclic number.

It is not a de Polignac number, because 421827752461 - 2¹⁵ = 421827719693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421827752431) 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, 4487529235 + ... + 4487529328.

It is an arithmetic number, because the mean of its divisors is an integer number (107700702768).

Almost surely, 2^421827752461 is an apocalyptic number.

It is an amenable number.

421827752461 is a deficient number, since it is larger than the sum of its proper divisors (8975058611).

421827752461 is an equidigital number, since it uses as much as digits as its factorization.

421827752461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8975058610.

The product of its digits is 1505280, while the sum is 49.

The spelling of 421827752461 in words is "four hundred twenty-one billion, eight hundred twenty-seven million, seven hundred fifty-two thousand, four hundred sixty-one".