81461454 has 32 divisors (see below), whose sum is σ = 165473280. Its totient is φ = 26732352.

The previous prime is 81461453. The next prime is 81461461. The reversal of 81461454 is 45416418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81461453) 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, 142882 + ... + 143450.

It is an arithmetic number, because the mean of its divisors is an integer number (5171040).

Almost surely, 2^81461454 is an apocalyptic number.

81461454 is an abundant number, since it is smaller than the sum of its proper divisors (84011826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81461454 is a wasteful number, since it uses less digits than its factorization.

81461454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904.

The product of its digits is 15360, while the sum is 33.

The square root of 81461454 is about 9025.5999246587. The cubic root of 81461454 is about 433.4949599581.

The spelling of 81461454 in words is "eighty-one million, four hundred sixty-one thousand, four hundred fifty-four".