91276225919 has 4 divisors (see below), whose sum is σ = 91280906496. Its totient is φ = 91271545344.

The previous prime is 91276225889. The next prime is 91276225939. The reversal of 91276225919 is 91952267219.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91952267219 = 186877 ⋅492047.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91276225919 is a prime.

It is a super-2 number, since 2×91276225919² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91276225939) 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, 2310914 + ... + 2350079.

It is an arithmetic number, because the mean of its divisors is an integer number (22820226624).

Almost surely, 2^91276225919 is an apocalyptic number.

91276225919 is a deficient number, since it is larger than the sum of its proper divisors (4680577).

91276225919 is a wasteful number, since it uses less digits than its factorization.

91276225919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680576.

The product of its digits is 1224720, while the sum is 53.

The spelling of 91276225919 in words is "ninety-one billion, two hundred seventy-six million, two hundred twenty-five thousand, nine hundred nineteen".