78610743765 has 12 divisors (see below), whose sum is σ = 136258622604. Its totient is φ = 41925729984.

The previous prime is 78610743751. The next prime is 78610743767. The reversal of 78610743765 is 56734701687.

It can be written as a sum of positive squares in 2 ways, for example, as 44386483761 + 34224260004 = 210681^2 + 184998^2 .

It is not a de Polignac number, because 78610743765 - 2¹⁶ = 78610678229 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78610743767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 873452664 + ... + 873452753.

It is an arithmetic number, because the mean of its divisors is an integer number (11354885217).

Almost surely, 2^78610743765 is an apocalyptic number.

It is an amenable number.

78610743765 is a deficient number, since it is larger than the sum of its proper divisors (57647878839).

78610743765 is a wasteful number, since it uses less digits than its factorization.

78610743765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746905428 (or 1746905425 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 54.

The spelling of 78610743765 in words is "seventy-eight billion, six hundred ten million, seven hundred forty-three thousand, seven hundred sixty-five".