190774477091 has 12 divisors (see below), whose sum is σ = 209705695416. Its totient is φ = 173421885120.

The previous prime is 190774477079. The next prime is 190774477123.

It is a happy number.

190774477091 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-190774477091 is a prime.

It is a super-2 number, since 2×190774477091² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190774477001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3178340 + ... + 3237806.

It is an arithmetic number, because the mean of its divisors is an integer number (17475474618).

Almost surely, 2^190774477091 is an apocalyptic number.

190774477091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

190774477091 is a deficient number, since it is larger than the sum of its proper divisors (18931218325).

190774477091 is a wasteful number, since it uses less digits than its factorization.

190774477091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86002 (or 85991 counting only the distinct ones).

The product of its (nonzero) digits is 3111696, while the sum is 56.

The spelling of 190774477091 in words is "one hundred ninety billion, seven hundred seventy-four million, four hundred seventy-seven thousand, ninety-one".