1164646640 has 20 divisors (see below), whose sum is σ = 2707803624. Its totient is φ = 465858624.

The previous prime is 1164646627. The next prime is 1164646673. The reversal of 1164646640 is 466464611.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1164646594 and 1164646603.

It is a congruent number.

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, 7278962 + ... + 7279121.

Almost surely, 2^1164646640 is an apocalyptic number.

1164646640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1164646640 is an abundant number, since it is smaller than the sum of its proper divisors (1543156984).

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

1164646640 is a wasteful number, since it uses less digits than its factorization.

1164646640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14558096 (or 14558090 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 1164646640 is about 34126.9195797101. The cubic root of 1164646640 is about 1052.1186669474.

The spelling of 1164646640 in words is "one billion, one hundred sixty-four million, six hundred forty-six thousand, six hundred forty".