491401964 has 12 divisors (see below), whose sum is σ = 860331864. Its totient is φ = 245592864.

The previous prime is 491401957. The next prime is 491401991. The reversal of 491401964 is 469104194.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16334 + ... + 35349.

It is an arithmetic number, because the mean of its divisors is an integer number (71694322).

Almost surely, 2^491401964 is an apocalyptic number.

It is an amenable number.

491401964 is a deficient number, since it is larger than the sum of its proper divisors (368929900).

491401964 is a wasteful number, since it uses less digits than its factorization.

491401964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54064 (or 54062 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 491401964 is about 22167.5881412480. The cubic root of 491401964 is about 789.1246855927.

The spelling of 491401964 in words is "four hundred ninety-one million, four hundred one thousand, nine hundred sixty-four".