91158370242 has 32 divisors (see below), whose sum is σ = 182553744384. Its totient is φ = 30346654800.

The previous prime is 91158370213. The next prime is 91158370253. The reversal of 91158370242 is 24207385119.

It is a super-2 number, since 2×91158370242² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91158370194 and 91158370203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22280617 + ... + 22284707.

It is an arithmetic number, because the mean of its divisors is an integer number (5704804512).

Almost surely, 2^91158370242 is an apocalyptic number.

91158370242 is an abundant number, since it is smaller than the sum of its proper divisors (91395374142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91158370242 is a wasteful number, since it uses less digits than its factorization.

91158370242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8014.

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 91158370242 in words is "ninety-one billion, one hundred fifty-eight million, three hundred seventy thousand, two hundred forty-two".