1464431661 has 72 divisors (see below), whose sum is σ = 2743383552. Its totient is φ = 736084800.

The previous prime is 1464431641. The next prime is 1464431713. The reversal of 1464431661 is 1661344641.

1464431661 is a `hidden beast` number, since 1 + 4 + 644 + 3 + 1 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 1464431661 - 2⁷ = 1464431533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1464431641) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 233215 + ... + 239411.

Almost surely, 2^1464431661 is an apocalyptic number.

1464431661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1464431661 is a deficient number, since it is larger than the sum of its proper divisors (1278951891).

1464431661 is a wasteful number, since it uses less digits than its factorization.

1464431661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6263 (or 6249 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 1464431661 is about 38267.8933441599. The cubic root of 1464431661 is about 1135.5938623405.

The spelling of 1464431661 in words is "one billion, four hundred sixty-four million, four hundred thirty-one thousand, six hundred sixty-one".