91240023202 has 8 divisors (see below), whose sum is σ = 136865714076. Its totient is φ = 45618118512.

The previous prime is 91240023157. The next prime is 91240023223. The reversal of 91240023202 is 20232004219.

It can be written as a sum of positive squares in 2 ways, for example, as 72361538001 + 18878485201 = 269001^2 + 137399^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 885513 + ... + 983164.

Almost surely, 2^91240023202 is an apocalyptic number.

91240023202 is a deficient number, since it is larger than the sum of its proper divisors (45625690874).

91240023202 is a wasteful number, since it uses less digits than its factorization.

91240023202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893092.

The product of its (nonzero) digits is 1728, while the sum is 25.

The spelling of 91240023202 in words is "ninety-one billion, two hundred forty million, twenty-three thousand, two hundred two".