78263910109 has 32 divisors (see below), whose sum is σ = 102651494400. Its totient is φ = 57883842240.

The previous prime is 78263910079. The next prime is 78263910113. The reversal of 78263910109 is 90101936287.

It is a happy number.

It is not a de Polignac number, because 78263910109 - 2¹³ = 78263901917 is a prime.

It is a super-2 number, since 2×78263910109² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78263910209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165277 + ... + 428770.

It is an arithmetic number, because the mean of its divisors is an integer number (3207859200).

Almost surely, 2^78263910109 is an apocalyptic number.

It is an amenable number.

78263910109 is a deficient number, since it is larger than the sum of its proper divisors (24387584291).

78263910109 is a wasteful number, since it uses less digits than its factorization.

78263910109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594153.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 78263910109 in words is "seventy-eight billion, two hundred sixty-three million, nine hundred ten thousand, one hundred nine".