91898566142 has 8 divisors (see below), whose sum is σ = 139789368432. Its totient is φ = 45302110000.

The previous prime is 91898566129. The next prime is 91898566157. The reversal of 91898566142 is 24166589819.

It is a happy number.

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

It is a congruent number.

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, 323586359 + ... + 323586642.

It is an arithmetic number, because the mean of its divisors is an integer number (17473671054).

Almost surely, 2^91898566142 is an apocalyptic number.

91898566142 is a deficient number, since it is larger than the sum of its proper divisors (47890802290).

91898566142 is a wasteful number, since it uses less digits than its factorization.

91898566142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647173074.

The product of its digits is 7464960, while the sum is 59.

The spelling of 91898566142 in words is "ninety-one billion, eight hundred ninety-eight million, five hundred sixty-six thousand, one hundred forty-two".