91742687252 has 6 divisors (see below), whose sum is σ = 160549702698. Its totient is φ = 45871343624.

The previous prime is 91742687233. The next prime is 91742687317. The reversal of 91742687252 is 25278624719.

It can be written as a sum of positive squares in only one way, i.e., 78829546756 + 12913140496 = 280766^2 + 113636^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91742687194 and 91742687203.

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, 11467835903 + ... + 11467835910.

It is an arithmetic number, because the mean of its divisors is an integer number (26758283783).

Almost surely, 2^91742687252 is an apocalyptic number.

It is an amenable number.

91742687252 is a deficient number, since it is larger than the sum of its proper divisors (68807015446).

91742687252 is a wasteful number, since it uses less digits than its factorization.

91742687252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22935671817 (or 22935671815 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 53.

The spelling of 91742687252 in words is "ninety-one billion, seven hundred forty-two million, six hundred eighty-seven thousand, two hundred fifty-two".