91241451844 has 27 divisors (see below), whose sum is σ = 168539867517. Its totient is φ = 43214197968.

The previous prime is 91241451827. The next prime is 91241451857. The reversal of 91241451844 is 44815414219.

The square root of 91241451844 is 302062.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 43665117444 + 47576334400 = 208962^2 + 218120^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 91241451844.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11474382 + ... + 11482330.

Almost surely, 2^91241451844 is an apocalyptic number.

91241451844 is the 302062-nd square number.

It is an amenable number.

91241451844 is a deficient number, since it is larger than the sum of its proper divisors (77298415673).

91241451844 is an frugal number, since it uses more digits than its factorization.

91241451844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15940 (or 7970 counting only the distinct ones).

The product of its digits is 184320, while the sum is 43.

The spelling of 91241451844 in words is "ninety-one billion, two hundred forty-one million, four hundred fifty-one thousand, eight hundred forty-four".