64779097746 has 16 divisors (see below), whose sum is σ = 141336213408. Its totient is φ = 19630029600.

The previous prime is 64779097727. The next prime is 64779097769.

64779097746 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: 981501481 = 64779097746 / (6 + 4 + 7 + 7 + 9 + 0 + 9 + 7 + 7 + 4 + 6).

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, 490750675 + ... + 490750806.

It is an arithmetic number, because the mean of its divisors is an integer number (8833513338).

Almost surely, 2^64779097746 is an apocalyptic number.

64779097746 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

64779097746 is an abundant number, since it is smaller than the sum of its proper divisors (76557115662).

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

64779097746 is a wasteful number, since it uses less digits than its factorization.

64779097746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981501497.

The product of its (nonzero) digits is 112021056, while the sum is 66.

The spelling of 64779097746 in words is "sixty-four billion, seven hundred seventy-nine million, ninety-seven thousand, seven hundred forty-six".