16177391097 has 32 divisors (see below), whose sum is σ = 26345336832. Its totient is φ = 8619112704.

The previous prime is 16177391093. The next prime is 16177391107. The reversal of 16177391097 is 79019377161.

It is not a de Polignac number, because 16177391097 - 2² = 16177391093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (16177391093) 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, 173553 + ... + 249950.

It is an arithmetic number, because the mean of its divisors is an integer number (823291776).

Almost surely, 2^16177391097 is an apocalyptic number.

16177391097 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16177391097 is a deficient number, since it is larger than the sum of its proper divisors (10167945735).

16177391097 is a wasteful number, since it uses less digits than its factorization.

16177391097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423637.

The product of its (nonzero) digits is 500094, while the sum is 51.

The spelling of 16177391097 in words is "sixteen billion, one hundred seventy-seven million, three hundred ninety-one thousand, ninety-seven".