78926036849 has 16 divisors (see below), whose sum is σ = 88243210944. Its totient is φ = 69967545600.

The previous prime is 78926036843. The next prime is 78926036863. The reversal of 78926036849 is 94863062987.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78926036849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78926036791 and 78926036800.

It is not an unprimeable number, because it can be changed into a prime (78926036843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 930362 + ... + 1011644.

It is an arithmetic number, because the mean of its divisors is an integer number (5515200684).

Almost surely, 2^78926036849 is an apocalyptic number.

It is an amenable number.

78926036849 is a deficient number, since it is larger than the sum of its proper divisors (9317174095).

78926036849 is a wasteful number, since it uses less digits than its factorization.

78926036849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83488.

The product of its (nonzero) digits is 31352832, while the sum is 62.

The spelling of 78926036849 in words is "seventy-eight billion, nine hundred twenty-six million, thirty-six thousand, eight hundred forty-nine".