83680155 has 32 divisors (see below), whose sum is σ = 160211520. Its totient is φ = 41195520.

The previous prime is 83680151. The next prime is 83680159. The reversal of 83680155 is 55108638.

It is an interprime number because it is at equal distance from previous prime (83680151) and next prime (83680159).

It is not a de Polignac number, because 83680155 - 2² = 83680151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83680151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22086 + ... + 25595.

It is an arithmetic number, because the mean of its divisors is an integer number (5006610).

Almost surely, 2^83680155 is an apocalyptic number.

83680155 is a deficient number, since it is larger than the sum of its proper divisors (76531365).

83680155 is a wasteful number, since it uses less digits than its factorization.

83680155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47708 (or 47702 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 83680155 is about 9147.6857729155. The cubic root of 83680155 is about 437.3953469410.

The spelling of 83680155 in words is "eighty-three million, six hundred eighty thousand, one hundred fifty-five".