73777064909 has 8 divisors (see below), whose sum is σ = 76325480760. Its totient is φ = 71228941056.

The previous prime is 73777064903. The next prime is 73777064939. The reversal of 73777064909 is 90946077737.

It can be written as a sum of positive squares in 4 ways, for example, as 17633184100 + 56143880809 = 132790^2 + 236947^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73777064909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73777064903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523889 + ... + 649625.

It is an arithmetic number, because the mean of its divisors is an integer number (9540685095).

Almost surely, 2^73777064909 is an apocalyptic number.

It is an amenable number.

73777064909 is a deficient number, since it is larger than the sum of its proper divisors (2548415851).

73777064909 is a wasteful number, since it uses less digits than its factorization.

73777064909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145999.

The product of its (nonzero) digits is 14002632, while the sum is 59.

The spelling of 73777064909 in words is "seventy-three billion, seven hundred seventy-seven million, sixty-four thousand, nine hundred nine".