191927463648 has 48 divisors (see below), whose sum is σ = 504247597056. Its totient is φ = 63920201600.

The previous prime is 191927463631. The next prime is 191927463653. The reversal of 191927463648 is 846364729191.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×191927463648² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 191927463591 and 191927463600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757986 + ... + 978977.

It is an arithmetic number, because the mean of its divisors is an integer number (10505158272).

Almost surely, 2^191927463648 is an apocalyptic number.

It is an amenable number.

191927463648 is an abundant number, since it is smaller than the sum of its proper divisors (312320133408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191927463648 is a wasteful number, since it uses less digits than its factorization.

191927463648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738127 (or 1738119 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 60.

The spelling of 191927463648 in words is "one hundred ninety-one billion, nine hundred twenty-seven million, four hundred sixty-three thousand, six hundred forty-eight".