91642157026 has 32 divisors (see below), whose sum is σ = 159816644352. Its totient is φ = 38599753920.

The previous prime is 91642157021. The next prime is 91642157051. The reversal of 91642157026 is 62075124619.

It is not an unprimeable number, because it can be changed into a prime (91642157021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169680 + ... + 460516.

It is an arithmetic number, because the mean of its divisors is an integer number (4994270136).

Almost surely, 2^91642157026 is an apocalyptic number.

91642157026 is a deficient number, since it is larger than the sum of its proper divisors (68174487326).

91642157026 is a wasteful number, since it uses less digits than its factorization.

91642157026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291234.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 91642157026 in words is "ninety-one billion, six hundred forty-two million, one hundred fifty-seven thousand, twenty-six".