91988062441 has 6 divisors (see below), whose sum is σ = 101110845626. Its totient is φ = 83625511200.

The previous prime is 91988062351. The next prime is 91988062457. The reversal of 91988062441 is 14426088919.

It can be written as a sum of positive squares in only one way, i.e., 49838330025 + 42149732416 = 223245^2 + 205304^2 .

It is not a de Polignac number, because 91988062441 - 2¹⁷ = 91987931369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91988032441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 380115840 + ... + 380116081.

Almost surely, 2^91988062441 is an apocalyptic number.

It is an amenable number.

91988062441 is a deficient number, since it is larger than the sum of its proper divisors (9122783185).

91988062441 is a wasteful number, since it uses less digits than its factorization.

91988062441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760231943 (or 760231932 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 52.

The spelling of 91988062441 in words is "ninety-one billion, nine hundred eighty-eight million, sixty-two thousand, four hundred forty-one".