91616061619 has 8 divisors (see below), whose sum is σ = 93229448400. Its totient is φ = 90016524000.

The previous prime is 91616061599. The next prime is 91616061659.

It is a happy number.

91616061619 is nontrivially palindromic in base 10.

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 91616061619 - 2⁵ = 91616061587 is a prime.

It is a super-2 number, since 2×91616061619² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91616061659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3448944 + ... + 3475405.

It is an arithmetic number, because the mean of its divisors is an integer number (11653681050).

Almost surely, 2^91616061619 is an apocalyptic number.

91616061619 is a deficient number, since it is larger than the sum of its proper divisors (1613386781).

91616061619 is a wasteful number, since it uses less digits than its factorization.

91616061619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6924581.

The product of its (nonzero) digits is 104976, while the sum is 46.

It can be divided in two parts, 916160 and 61619, that added together give a palindrome (977779).

The spelling of 91616061619 in words is "ninety-one billion, six hundred sixteen million, sixty-one thousand, six hundred nineteen".