421161527838491 has 16 divisors (see below), whose sum is σ = 459638584938240. Its totient is φ = 382716106627680.

The previous prime is 421161527838449. The next prime is 421161527838509. The reversal of 421161527838491 is 194838725161124.

It is a cyclic number.

It is not a de Polignac number, because 421161527838491 - 2⁶ = 421161527838427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421161527838431) 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, 299221565 + ... + 300625793.

It is an arithmetic number, because the mean of its divisors is an integer number (28727411558640).

Almost surely, 2^{421161527838491} is an apocalyptic number.

421161527838491 is a deficient number, since it is larger than the sum of its proper divisors (38477057099749).

421161527838491 is a wasteful number, since it uses less digits than its factorization.

421161527838491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415474.

The product of its digits is 23224320, while the sum is 62.

The spelling of 421161527838491 in words is "four hundred twenty-one trillion, one hundred sixty-one billion, five hundred twenty-seven million, eight hundred thirty-eight thousand, four hundred ninety-one".