191651412720 has 80 divisors (see below), whose sum is σ = 600244394400. Its totient is φ = 50580160512.

The previous prime is 191651412703. The next prime is 191651412739. The reversal of 191651412720 is 27214156191.

It is a happy number.

191651412720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4092945 + ... + 4139504.

It is an arithmetic number, because the mean of its divisors is an integer number (7503054930).

Almost surely, 2^191651412720 is an apocalyptic number.

191651412720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191651412720 is an abundant number, since it is smaller than the sum of its proper divisors (408592981680).

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

191651412720 is a wasteful number, since it uses less digits than its factorization.

191651412720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8232562 (or 8232556 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 39.

The spelling of 191651412720 in words is "one hundred ninety-one billion, six hundred fifty-one million, four hundred twelve thousand, seven hundred twenty".