81877358 has 8 divisors (see below), whose sum is σ = 123753960. Its totient is φ = 40626040.

The previous prime is 81877319. The next prime is 81877379. The reversal of 81877358 is 85377818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155993 + ... + 156516.

It is an arithmetic number, because the mean of its divisors is an integer number (15469245).

Almost surely, 2^81877358 is an apocalyptic number.

81877358 is a deficient number, since it is larger than the sum of its proper divisors (41876602).

81877358 is a wasteful number, since it uses less digits than its factorization.

81877358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312642.

The product of its digits is 376320, while the sum is 47.

The square root of 81877358 is about 9048.6108326085. The cubic root of 81877358 is about 434.2314486777.

The spelling of 81877358 in words is "eighty-one million, eight hundred seventy-seven thousand, three hundred fifty-eight".