191265644064 has 192 divisors, whose sum is σ = 572523614208. Its totient is φ = 55342848000.

The previous prime is 191265644057. The next prime is 191265644099. The reversal of 191265644064 is 460446562191.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14590537 + ... + 14603639.

It is an arithmetic number, because the mean of its divisors is an integer number (2981893824).

Almost surely, 2^191265644064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191265644064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286261807104).

191265644064 is an abundant number, since it is smaller than the sum of its proper divisors (381257970144).

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

191265644064 is a wasteful number, since it uses less digits than its factorization.

191265644064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13751 (or 13743 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 191265644064 in words is "one hundred ninety-one billion, two hundred sixty-five million, six hundred forty-four thousand, sixty-four".