91551542032 has 10 divisors (see below), whose sum is σ = 177381112718. Its totient is φ = 45775771008.

The previous prime is 91551542029. The next prime is 91551542039. The reversal of 91551542032 is 23024515519.

It can be written as a sum of positive squares in only one way, i.e., 91080825616 + 470716416 = 301796^2 + 21696^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91551541982 and 91551542000.

It is not an unprimeable number, because it can be changed into a prime (91551542039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2860985673 + ... + 2860985704.

Almost surely, 2^91551542032 is an apocalyptic number.

It is an amenable number.

91551542032 is a deficient number, since it is larger than the sum of its proper divisors (85829570686).

91551542032 is a wasteful number, since it uses less digits than its factorization.

91551542032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5721971385 (or 5721971379 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 91551542032 in words is "ninety-one billion, five hundred fifty-one million, five hundred forty-two thousand, thirty-two".