64380903723 has 24 divisors (see below), whose sum is σ = 98803972800. Its totient is φ = 40281596784.

The previous prime is 64380903709. The next prime is 64380903731. The reversal of 64380903723 is 32730908346.

It is not a de Polignac number, because 64380903723 - 2⁶ = 64380903659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64380903823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1741033 + ... + 1777626.

It is an arithmetic number, because the mean of its divisors is an integer number (4116832200).

Almost surely, 2^64380903723 is an apocalyptic number.

64380903723 is a deficient number, since it is larger than the sum of its proper divisors (34423069077).

64380903723 is a wasteful number, since it uses less digits than its factorization.

64380903723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518791 (or 3518788 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 64380903723 in words is "sixty-four billion, three hundred eighty million, nine hundred three thousand, seven hundred twenty-three".