190117777649 has 4 divisors (see below), whose sum is σ = 190120068336. Its totient is φ = 190115486964.

The previous prime is 190117777627. The next prime is 190117777651. The reversal of 190117777649 is 946777711091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190117777649 is a prime.

It is a super-2 number, since 2×190117777649² (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 (190117777609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1015979 + ... + 1188464.

It is an arithmetic number, because the mean of its divisors is an integer number (47530017084).

Almost surely, 2^190117777649 is an apocalyptic number.

It is an amenable number.

190117777649 is a deficient number, since it is larger than the sum of its proper divisors (2290687).

190117777649 is an equidigital number, since it uses as much as digits as its factorization.

190117777649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290686.

The product of its (nonzero) digits is 4667544, while the sum is 59.

The spelling of 190117777649 in words is "one hundred ninety billion, one hundred seventeen million, seven hundred seventy-seven thousand, six hundred forty-nine".