91986349242 has 16 divisors (see below), whose sum is σ = 184013036352. Its totient is φ = 30655393440.

The previous prime is 91986349241. The next prime is 91986349243. The reversal of 91986349242 is 24294368919.

It is an interprime number because it is at equal distance from previous prime (91986349241) and next prime (91986349243).

It is a super-2 number, since 2×91986349242² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91986349241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1651059 + ... + 1705862.

It is an arithmetic number, because the mean of its divisors is an integer number (11500814772).

Almost surely, 2^91986349242 is an apocalyptic number.

91986349242 is an abundant number, since it is smaller than the sum of its proper divisors (92026687110).

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

91986349242 is a wasteful number, since it uses less digits than its factorization.

91986349242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3361493.

The product of its digits is 6718464, while the sum is 57.

The spelling of 91986349242 in words is "ninety-one billion, nine hundred eighty-six million, three hundred forty-nine thousand, two hundred forty-two".