91612221542 has 8 divisors (see below), whose sum is σ = 137430226776. Its totient is φ = 45802145952.

The previous prime is 91612221523. The next prime is 91612221563. The reversal of 91612221542 is 24512221619.

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, 1953443 + ... + 1999790.

It is an arithmetic number, because the mean of its divisors is an integer number (17178778347).

Almost surely, 2^91612221542 is an apocalyptic number.

91612221542 is a deficient number, since it is larger than the sum of its proper divisors (45818005234).

91612221542 is a wasteful number, since it uses less digits than its factorization.

91612221542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964822.

The product of its digits is 17280, while the sum is 35.

The spelling of 91612221542 in words is "ninety-one billion, six hundred twelve million, two hundred twenty-one thousand, five hundred forty-two".