91475368490787 has 16 divisors (see below), whose sum is σ = 124304403389952. Its totient is φ = 59820404418720.

The previous prime is 91475368490783. The next prime is 91475368490813. The reversal of 91475368490787 is 78709486357419.

It is not a de Polignac number, because 91475368490787 - 2² = 91475368490783 is a prime.

It is a super-2 number, since 2×91475368490787² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91475368490783) 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, 680948373 + ... + 681082694.

It is an arithmetic number, because the mean of its divisors is an integer number (7769025211872).

Almost surely, 2^{91475368490787} is an apocalyptic number.

91475368490787 is a deficient number, since it is larger than the sum of its proper divisors (32829034899165).

91475368490787 is a wasteful number, since it uses less digits than its factorization.

91475368490787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362031498.

The product of its (nonzero) digits is 2560481280, while the sum is 78.

The spelling of 91475368490787 in words is "ninety-one trillion, four hundred seventy-five billion, three hundred sixty-eight million, four hundred ninety thousand, seven hundred eighty-seven".