91124015806 has 16 divisors (see below), whose sum is σ = 141164508240. Its totient is φ = 44082938880.

The previous prime is 91124015803. The next prime is 91124015821. The reversal of 91124015806 is 60851042119.

It is a super-2 number, since 2×91124015806² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91124015803) 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, 3426435 + ... + 3452926.

It is an arithmetic number, because the mean of its divisors is an integer number (8822781765).

Almost surely, 2^91124015806 is an apocalyptic number.

91124015806 is a deficient number, since it is larger than the sum of its proper divisors (50040492434).

91124015806 is a wasteful number, since it uses less digits than its factorization.

91124015806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6879579.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 91124015806 in words is "ninety-one billion, one hundred twenty-four million, fifteen thousand, eight hundred six".