64990863734 has 8 divisors (see below), whose sum is σ = 97546738320. Its totient is φ = 32475284296.

The previous prime is 64990863727. The next prime is 64990863737. The reversal of 64990863734 is 43736809946.

It is a happy number.

64990863734 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64990863737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10069754 + ... + 10076205.

It is an arithmetic number, because the mean of its divisors is an integer number (12193342290).

Almost surely, 2^64990863734 is an apocalyptic number.

64990863734 is a deficient number, since it is larger than the sum of its proper divisors (32555874586).

64990863734 is a wasteful number, since it uses less digits than its factorization.

64990863734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20147574.

The product of its (nonzero) digits is 23514624, while the sum is 59.

The spelling of 64990863734 in words is "sixty-four billion, nine hundred ninety million, eight hundred sixty-three thousand, seven hundred thirty-four".