91554119771 has 4 divisors (see below), whose sum is σ = 91561149000. Its totient is φ = 91547090544.

The previous prime is 91554119743. The next prime is 91554119779. The reversal of 91554119771 is 17791145519.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17791145519 = 7 ⋅2541592217.

It is a cyclic number.

It is not a de Polignac number, because 91554119771 - 2¹⁴ = 91554103387 is a prime.

It is a super-2 number, since 2×91554119771² (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 (91554119779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3495041 + ... + 3521138.

It is an arithmetic number, because the mean of its divisors is an integer number (22890287250).

Almost surely, 2^91554119771 is an apocalyptic number.

91554119771 is a deficient number, since it is larger than the sum of its proper divisors (7029229).

91554119771 is a wasteful number, since it uses less digits than its factorization.

91554119771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7029228.

The product of its digits is 396900, while the sum is 50.

The spelling of 91554119771 in words is "ninety-one billion, five hundred fifty-four million, one hundred nineteen thousand, seven hundred seventy-one".