191771463496 has 8 divisors (see below), whose sum is σ = 359571494070. Its totient is φ = 95885731744.

The previous prime is 191771463493. The next prime is 191771463497. The reversal of 191771463496 is 694364177191.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 176472247396 + 15299216100 = 420086^2 + 123690^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×191771463496² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 191771463496.

It is not an unprimeable number, because it can be changed into a prime (191771463493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11985716461 + ... + 11985716476.

Almost surely, 2^191771463496 is an apocalyptic number.

It is an amenable number.

191771463496 is a deficient number, since it is larger than the sum of its proper divisors (167800030574).

191771463496 is a wasteful number, since it uses less digits than its factorization.

191771463496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23971432943 (or 23971432939 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 58.

The spelling of 191771463496 in words is "one hundred ninety-one billion, seven hundred seventy-one million, four hundred sixty-three thousand, four hundred ninety-six".