190695981971 has 24 divisors (see below), whose sum is σ = 212770714464. Its totient is φ = 170749040000.

The previous prime is 190695981967. The next prime is 190695981977. The reversal of 190695981971 is 179189596091.

It is not a de Polignac number, because 190695981971 - 2² = 190695981967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 190695981898 and 190695981907.

It is not an unprimeable number, because it can be changed into a prime (190695981977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9104591 + ... + 9125511.

It is an arithmetic number, because the mean of its divisors is an integer number (8865446436).

Almost surely, 2^190695981971 is an apocalyptic number.

190695981971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

190695981971 is a deficient number, since it is larger than the sum of its proper divisors (22074732493).

190695981971 is a wasteful number, since it uses less digits than its factorization.

190695981971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22075 (or 22064 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 65.

The spelling of 190695981971 in words is "one hundred ninety billion, six hundred ninety-five million, nine hundred eighty-one thousand, nine hundred seventy-one".