191158362040 has 32 divisors (see below), whose sum is σ = 437157243360. Its totient is φ = 75209846400.

The previous prime is 191158361957. The next prime is 191158362049. The reversal of 191158362040 is 40263851191.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 191158361984 and 191158362002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191158362049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39169356 + ... + 39174235.

It is an arithmetic number, because the mean of its divisors is an integer number (13661163855).

Almost surely, 2^191158362040 is an apocalyptic number.

191158362040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191158362040 is an abundant number, since it is smaller than the sum of its proper divisors (245998881320).

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

191158362040 is a wasteful number, since it uses less digits than its factorization.

191158362040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78343663 (or 78343659 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 191158362040 in words is "one hundred ninety-one billion, one hundred fifty-eight million, three hundred sixty-two thousand, forty".