64748497784 has 16 divisors (see below), whose sum is σ = 121947846720. Its totient is φ = 32229072000.

The previous prime is 64748497753. The next prime is 64748497819. The reversal of 64748497784 is 48779484746.

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, 18145217 + ... + 18148784.

It is an arithmetic number, because the mean of its divisors is an integer number (7621740420).

Almost surely, 2^64748497784 is an apocalyptic number.

It is an amenable number.

64748497784 is a deficient number, since it is larger than the sum of its proper divisors (57199348936).

64748497784 is a wasteful number, since it uses less digits than its factorization.

64748497784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36294230 (or 36294226 counting only the distinct ones).

The product of its digits is 303464448, while the sum is 68.

The spelling of 64748497784 in words is "sixty-four billion, seven hundred forty-eight million, four hundred ninety-seven thousand, seven hundred eighty-four".