491621010 has 32 divisors (see below), whose sum is σ = 1241991360. Its totient is φ = 124198848.

The previous prime is 491620993. The next prime is 491621027. The reversal of 491621010 is 10126194.

It is an interprime number because it is at equal distance from previous prime (491620993) and next prime (491621027).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430677 + ... + 431816.

It is an arithmetic number, because the mean of its divisors is an integer number (38812230).

Almost surely, 2^491621010 is an apocalyptic number.

491621010 is an abundant number, since it is smaller than the sum of its proper divisors (750370350).

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

491621010 is a wasteful number, since it uses less digits than its factorization.

491621010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862522.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 491621010 is about 22172.5282726170. The cubic root of 491621010 is about 789.2419208645.

The spelling of 491621010 in words is "four hundred ninety-one million, six hundred twenty-one thousand, ten".