81602374 has 8 divisors (see below), whose sum is σ = 139889808. Its totient is φ = 34972440.

The previous prime is 81602333. The next prime is 81602399. The reversal of 81602374 is 47320618.

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, 2914357 + ... + 2914384.

It is an arithmetic number, because the mean of its divisors is an integer number (17486226).

Almost surely, 2^81602374 is an apocalyptic number.

81602374 is a deficient number, since it is larger than the sum of its proper divisors (58287434).

81602374 is a wasteful number, since it uses less digits than its factorization.

81602374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5828750.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 81602374 is about 9033.4032346619. The cubic root of 81602374 is about 433.7447833006.

The spelling of 81602374 in words is "eighty-one million, six hundred two thousand, three hundred seventy-four".