91405145594 has 16 divisors (see below), whose sum is σ = 158215843968. Its totient is φ = 38793306672.

The previous prime is 91405145591. The next prime is 91405145599. The reversal of 91405145594 is 49554150419.

It is a super-2 number, since 2×91405145594² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91405145591) 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, 31692437 + ... + 31695320.

It is an arithmetic number, because the mean of its divisors is an integer number (9888490248).

Almost surely, 2^91405145594 is an apocalyptic number.

91405145594 is a deficient number, since it is larger than the sum of its proper divisors (66810698374).

91405145594 is a wasteful number, since it uses less digits than its factorization.

91405145594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63387869.

The product of its (nonzero) digits is 648000, while the sum is 47.

The spelling of 91405145594 in words is "ninety-one billion, four hundred five million, one hundred forty-five thousand, five hundred ninety-four".