91023071492 has 12 divisors (see below), whose sum is σ = 159502484736. Its totient is φ = 45450933000.

The previous prime is 91023071467. The next prime is 91023071497. The reversal of 91023071492 is 29417032019.

It is not an unprimeable number, because it can be changed into a prime (91023071497) 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, 15147308 + ... + 15153315.

It is an arithmetic number, because the mean of its divisors is an integer number (13291873728).

Almost surely, 2^91023071492 is an apocalyptic number.

It is an amenable number.

91023071492 is a deficient number, since it is larger than the sum of its proper divisors (68479413244).

91023071492 is a wasteful number, since it uses less digits than its factorization.

91023071492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30301378 (or 30301376 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 91023071492 in words is "ninety-one billion, twenty-three million, seventy-one thousand, four hundred ninety-two".