191372048720 has 20 divisors (see below), whose sum is σ = 444940013460. Its totient is φ = 76548819456.

The previous prime is 191372048701. The next prime is 191372048753. The reversal of 191372048720 is 27840273191.

It can be written as a sum of positive squares in 2 ways, for example, as 150972656704 + 40399392016 = 388552^2 + 200996^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×191372048720² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1196075225 + ... + 1196075384.

It is an arithmetic number, because the mean of its divisors is an integer number (22247000673).

Almost surely, 2^191372048720 is an apocalyptic number.

191372048720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191372048720 is an abundant number, since it is smaller than the sum of its proper divisors (253567964740).

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

191372048720 is a wasteful number, since it uses less digits than its factorization.

191372048720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392150622 (or 2392150616 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 191372048720 in words is "one hundred ninety-one billion, three hundred seventy-two million, forty-eight thousand, seven hundred twenty".