91619666039 has 8 divisors (see below), whose sum is σ = 100107131520. Its totient is φ = 83158601400.

The previous prime is 91619666029. The next prime is 91619666077. The reversal of 91619666039 is 93066691619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91619666039 - 2²⁴ = 91602888823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91619666029) 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, 6592949 + ... + 6606830.

It is an arithmetic number, because the mean of its divisors is an integer number (12513391440).

Almost surely, 2^91619666039 is an apocalyptic number.

91619666039 is a deficient number, since it is larger than the sum of its proper divisors (8487465481).

91619666039 is a wasteful number, since it uses less digits than its factorization.

91619666039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13200421.

The product of its (nonzero) digits is 2834352, while the sum is 56.

The spelling of 91619666039 in words is "ninety-one billion, six hundred nineteen million, six hundred sixty-six thousand, thirty-nine".