91542871039 has 16 divisors (see below), whose sum is σ = 98157863232. Its totient is φ = 85070368768.

The previous prime is 91542871037. The next prime is 91542871061. The reversal of 91542871039 is 93017824519.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 91542871039 - 2¹ = 91542871037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91542870983 and 91542871001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91542871037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 414627 + ... + 595819.

It is an arithmetic number, because the mean of its divisors is an integer number (6134866452).

Almost surely, 2^91542871039 is an apocalyptic number.

91542871039 is a deficient number, since it is larger than the sum of its proper divisors (6614992193).

91542871039 is a wasteful number, since it uses less digits than its factorization.

91542871039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181586.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 91542871039 in words is "ninety-one billion, five hundred forty-two million, eight hundred seventy-one thousand, thirty-nine".