816680151 has 80 divisors (see below), whose sum is σ = 1457111040. Its totient is φ = 446031360.

The previous prime is 816680147. The next prime is 816680177. The reversal of 816680151 is 151086618.

It is not a de Polignac number, because 816680151 - 2² = 816680147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816680101) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1704730 + ... + 1705208.

It is an arithmetic number, because the mean of its divisors is an integer number (18213888).

Almost surely, 2^816680151 is an apocalyptic number.

816680151 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

816680151 is a deficient number, since it is larger than the sum of its proper divisors (640430889).

816680151 is a wasteful number, since it uses less digits than its factorization.

816680151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 816680151 is about 28577.6162581836. The cubic root of 816680151 is about 934.7253050275.

The spelling of 816680151 in words is "eight hundred sixteen million, six hundred eighty thousand, one hundred fifty-one".