461024978878481 has 2 divisors, whose sum is σ = 461024978878482. Its totient is φ = 461024978878480.

The previous prime is 461024978878439. The next prime is 461024978878493. The reversal of 461024978878481 is 184878879420164.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 457870124410000 + 3154854468481 = 21397900^2 + 1776191^2 .

It is a cyclic number.

It is not a de Polignac number, because 461024978878481 - 2⁴² = 456626932367377 is a prime.

It is a super-2 number, since 2×461024978878481² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (461024978878181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230512489439240 + 230512489439241.

It is an arithmetic number, because the mean of its divisors is an integer number (230512489439241).

Almost surely, 2^{461024978878481} is an apocalyptic number.

It is an amenable number.

461024978878481 is a deficient number, since it is larger than the sum of its proper divisors (1).

461024978878481 is an equidigital number, since it uses as much as digits as its factorization.

461024978878481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1387266048, while the sum is 77.

The spelling of 461024978878481 in words is "four hundred sixty-one trillion, twenty-four billion, nine hundred seventy-eight million, eight hundred seventy-eight thousand, four hundred eighty-one".