64402782718 has 8 divisors (see below), whose sum is σ = 96719318640. Its totient is φ = 32163009840.

The previous prime is 64402782707. The next prime is 64402782749. The reversal of 64402782718 is 81728720446.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 19188663 + ... + 19192018.

It is an arithmetic number, because the mean of its divisors is an integer number (12089914830).

Almost surely, 2^64402782718 is an apocalyptic number.

64402782718 is a deficient number, since it is larger than the sum of its proper divisors (32316535922).

64402782718 is a wasteful number, since it uses less digits than its factorization.

64402782718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38381522.

The product of its (nonzero) digits is 1204224, while the sum is 49.

The spelling of 64402782718 in words is "sixty-four billion, four hundred two million, seven hundred eighty-two thousand, seven hundred eighteen".