64749694746 has 16 divisors (see below), whose sum is σ = 141272061408. Its totient is φ = 19621119600.

The previous prime is 64749694729. The next prime is 64749694769.

64749694746 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 981055981 = 64749694746 / (6 + 4 + 7 + 4 + 9 + 6 + 9 + 4 + 7 + 4 + 6).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490527925 + ... + 490528056.

It is an arithmetic number, because the mean of its divisors is an integer number (8829503838).

Almost surely, 2^64749694746 is an apocalyptic number.

64749694746 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

64749694746 is an abundant number, since it is smaller than the sum of its proper divisors (76522366662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64749694746 is a wasteful number, since it uses less digits than its factorization.

64749694746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981055997.

The product of its digits is 219469824, while the sum is 66.

The spelling of 64749694746 in words is "sixty-four billion, seven hundred forty-nine million, six hundred ninety-four thousand, seven hundred forty-six".