619968764 has 6 divisors (see below), whose sum is σ = 1084945344. Its totient is φ = 309984380.

The previous prime is 619968763. The next prime is 619968829. The reversal of 619968764 is 467869916.

It is a super-2 number, since 2×619968764² = 768722536671375392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (619968761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77496092 + ... + 77496099.

It is an arithmetic number, because the mean of its divisors is an integer number (180824224).

Almost surely, 2^619968764 is an apocalyptic number.

It is an amenable number.

619968764 is a deficient number, since it is larger than the sum of its proper divisors (464976580).

619968764 is a wasteful number, since it uses less digits than its factorization.

619968764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154992195 (or 154992193 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 56.

The square root of 619968764 is about 24899.1719541032. The cubic root of 619968764 is about 852.6875781971.

The spelling of 619968764 in words is "six hundred nineteen million, nine hundred sixty-eight thousand, seven hundred sixty-four".