91487001044 has 24 divisors (see below), whose sum is σ = 160844695200. Its totient is φ = 45531612000.

The previous prime is 91487001041. The next prime is 91487001101. The reversal of 91487001044 is 44010078419.

It is a junction number, because it is equal to n+sod(n) for n = 91487000989 and 91487001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91487001041) 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, 1556462 + ... + 1614170.

It is an arithmetic number, because the mean of its divisors is an integer number (6701862300).

Almost surely, 2^91487001044 is an apocalyptic number.

It is an amenable number.

91487001044 is a deficient number, since it is larger than the sum of its proper divisors (69357694156).

91487001044 is a wasteful number, since it uses less digits than its factorization.

91487001044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59543 (or 59541 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 91487001044 in words is "ninety-one billion, four hundred eighty-seven million, one thousand, forty-four".