785985211649 has 4 divisors (see below), whose sum is σ = 857438412720. Its totient is φ = 714532010580.

The previous prime is 785985211643. The next prime is 785985211651. The reversal of 785985211649 is 946112589587.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 946112589587 = 11 ⋅86010235417.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-785985211649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (785985211643) 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, 35726600519 + ... + 35726600540.

It is an arithmetic number, because the mean of its divisors is an integer number (214359603180).

Almost surely, 2^785985211649 is an apocalyptic number.

It is an amenable number.

785985211649 is a deficient number, since it is larger than the sum of its proper divisors (71453201071).

785985211649 is a wasteful number, since it uses less digits than its factorization.

785985211649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71453201070.

The product of its digits is 43545600, while the sum is 65.

The spelling of 785985211649 in words is "seven hundred eighty-five billion, nine hundred eighty-five million, two hundred eleven thousand, six hundred forty-nine".