1491009764 has 12 divisors (see below), whose sum is σ = 2664783744. Its totient is φ = 729642984.

The previous prime is 1491009719. The next prime is 1491009823. The reversal of 1491009764 is 4679001941.

It is a super-2 number, since 2×1491009764² = 4446220232686671392, which contains 22 as substring.

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, 3965264 + ... + 3965639.

It is an arithmetic number, because the mean of its divisors is an integer number (222065312).

Almost surely, 2^1491009764 is an apocalyptic number.

It is an amenable number.

1491009764 is a deficient number, since it is larger than the sum of its proper divisors (1173773980).

1491009764 is a wasteful number, since it uses less digits than its factorization.

1491009764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7930954 (or 7930952 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 1491009764 is about 38613.5955849750. The cubic root of 1491009764 is about 1142.4227136422.

The spelling of 1491009764 in words is "one billion, four hundred ninety-one million, nine thousand, seven hundred sixty-four".