91109770396 has 6 divisors (see below), whose sum is σ = 159442098200. Its totient is φ = 45554885196.

The previous prime is 91109770343. The next prime is 91109770429. The reversal of 91109770396 is 69307790119.

It is a super-2 number, since 2×91109770396² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11388721296 + ... + 11388721303.

Almost surely, 2^91109770396 is an apocalyptic number.

It is an amenable number.

91109770396 is a deficient number, since it is larger than the sum of its proper divisors (68332327804).

91109770396 is a wasteful number, since it uses less digits than its factorization.

91109770396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22777442603 (or 22777442601 counting only the distinct ones).

The product of its (nonzero) digits is 642978, while the sum is 52.

The spelling of 91109770396 in words is "ninety-one billion, one hundred nine million, seven hundred seventy thousand, three hundred ninety-six".