91791406276 has 6 divisors (see below), whose sum is σ = 160634960990. Its totient is φ = 45895703136.

The previous prime is 91791406241. The next prime is 91791406319. The reversal of 91791406276 is 67260419719.

It can be written as a sum of positive squares in only one way, i.e., 87986983876 + 3804422400 = 296626^2 + 61680^2 .

It is a super-2 number, since 2×91791406276² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 11473925781 + ... + 11473925788.

Almost surely, 2^91791406276 is an apocalyptic number.

It is an amenable number.

91791406276 is a deficient number, since it is larger than the sum of its proper divisors (68843554714).

91791406276 is a wasteful number, since it uses less digits than its factorization.

91791406276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22947851573 (or 22947851571 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 52.

The spelling of 91791406276 in words is "ninety-one billion, seven hundred ninety-one million, four hundred six thousand, two hundred seventy-six".