1916640464 has 10 divisors (see below), whose sum is σ = 3713490930. Its totient is φ = 958320224.

The previous prime is 1916640373. The next prime is 1916640487. The reversal of 1916640464 is 4640466191.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1341024400 + 575616064 = 36620^2 + 23992^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59894999 + ... + 59895030.

It is an arithmetic number, because the mean of its divisors is an integer number (371349093).

Almost surely, 2^1916640464 is an apocalyptic number.

It is an amenable number.

1916640464 is a deficient number, since it is larger than the sum of its proper divisors (1796850466).

1916640464 is a wasteful number, since it uses less digits than its factorization.

1916640464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119790037 (or 119790031 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 1916640464 is about 43779.4525319813. The cubic root of 1916640464 is about 1242.1676583619.

The spelling of 1916640464 in words is "one billion, nine hundred sixteen million, six hundred forty thousand, four hundred sixty-four".