91619666054 has 8 divisors (see below), whose sum is σ = 157062284688. Its totient is φ = 39265571160.

The previous prime is 91619666029. The next prime is 91619666077. The reversal of 91619666054 is 45066691619.

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

It is a junction number, because it is equal to n+sod(n) for n = 91619665987 and 91619666005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3272130917 + ... + 3272130944.

It is an arithmetic number, because the mean of its divisors is an integer number (19632785586).

Almost surely, 2^91619666054 is an apocalyptic number.

91619666054 is a deficient number, since it is larger than the sum of its proper divisors (65442618634).

91619666054 is a wasteful number, since it uses less digits than its factorization.

91619666054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6544261870.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 91619666054 in words is "ninety-one billion, six hundred nineteen million, six hundred sixty-six thousand, fifty-four".