81901410 has 32 divisors (see below), whose sum is σ = 208127232. Its totient is φ = 20555520.

The previous prime is 81901409. The next prime is 81901439. The reversal of 81901410 is 1410918.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79786 + ... + 80805.

It is an arithmetic number, because the mean of its divisors is an integer number (6503976).

Almost surely, 2^81901410 is an apocalyptic number.

81901410 is an abundant number, since it is smaller than the sum of its proper divisors (126225822).

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

81901410 is a wasteful number, since it uses less digits than its factorization.

81901410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160618.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 81901410 is about 9049.9397788052. The cubic root of 81901410 is about 434.2739639410.

The spelling of 81901410 in words is "eighty-one million, nine hundred one thousand, four hundred ten".