80681718 has 16 divisors (see below), whose sum is σ = 173776176. Its totient is φ = 24825120.

The previous prime is 80681693. The next prime is 80681743. The reversal of 80681718 is 81718608.

It is an interprime number because it is at equal distance from previous prime (80681693) and next prime (80681743).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517113 + ... + 517268.

It is an arithmetic number, because the mean of its divisors is an integer number (10861011).

Almost surely, 2^80681718 is an apocalyptic number.

80681718 is an abundant number, since it is smaller than the sum of its proper divisors (93094458).

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

80681718 is a wasteful number, since it uses less digits than its factorization.

80681718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034399.

The product of its (nonzero) digits is 21504, while the sum is 39.

The square root of 80681718 is about 8982.3002621823. The cubic root of 80681718 is about 432.1074085636.

The spelling of 80681718 in words is "eighty million, six hundred eighty-one thousand, seven hundred eighteen".