78894953810 has 32 divisors (see below), whose sum is σ = 154307289600. Its totient is φ = 28932612480.

The previous prime is 78894953771. The next prime is 78894953899. The reversal of 78894953810 is 1835949887.

It is a super-2 number, since 2×78894953810² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6691475 + ... + 6703254.

It is an arithmetic number, because the mean of its divisors is an integer number (4822102800).

Almost surely, 2^78894953810 is an apocalyptic number.

78894953810 is a deficient number, since it is larger than the sum of its proper divisors (75412335790).

78894953810 is a wasteful number, since it uses less digits than its factorization.

78894953810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13394786.

The product of its (nonzero) digits is 17418240, while the sum is 62.

The spelling of 78894953810 in words is "seventy-eight billion, eight hundred ninety-four million, nine hundred fifty-three thousand, eight hundred ten".