991142463260 has 24 divisors (see below), whose sum is σ = 2081657973696. Its totient is φ = 396407689920.

The previous prime is 991142463247. The next prime is 991142463301. The reversal of 991142463260 is 62364241199.

991142463260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2915876 + ... + 3237995.

It is an arithmetic number, because the mean of its divisors is an integer number (86735748904).

Almost surely, 2^991142463260 is an apocalyptic number.

It is an amenable number.

991142463260 is an abundant number, since it is smaller than the sum of its proper divisors (1090515510436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

991142463260 is a wasteful number, since it uses less digits than its factorization.

991142463260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6161933 (or 6161931 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 47.

The spelling of 991142463260 in words is "nine hundred ninety-one billion, one hundred forty-two million, four hundred sixty-three thousand, two hundred sixty".