991654146 has 48 divisors (see below), whose sum is σ = 2471833728. Its totient is φ = 281448000.

The previous prime is 991654127. The next prime is 991654187. The reversal of 991654146 is 641456199.

It is a happy number.

991654146 is a `hidden beast` number, since 99 + 16 + 541 + 4 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7035 + ... + 45086.

It is an arithmetic number, because the mean of its divisors is an integer number (51496536).

Almost surely, 2^991654146 is an apocalyptic number.

991654146 is an abundant number, since it is smaller than the sum of its proper divisors (1480179582).

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

991654146 is a wasteful number, since it uses less digits than its factorization.

991654146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52287 (or 52284 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 991654146 is about 31490.5405796725. The cubic root of 991654146 is about 997.2102733289.

The spelling of 991654146 in words is "nine hundred ninety-one million, six hundred fifty-four thousand, one hundred forty-six".