78351845 has 16 divisors (see below), whose sum is σ = 110460672. Its totient is φ = 52599360.

The previous prime is 78351841. The next prime is 78351851. The reversal of 78351845 is 54815387.

It is not a de Polignac number, because 78351845 - 2² = 78351841 is a prime.

It is a super-2 number, since 2×78351845² = 12278023229808050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78351841) 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, 54077 + ... + 55506.

It is an arithmetic number, because the mean of its divisors is an integer number (6903792).

Almost surely, 2^78351845 is an apocalyptic number.

It is an amenable number.

78351845 is a deficient number, since it is larger than the sum of its proper divisors (32108827).

78351845 is a wasteful number, since it uses less digits than its factorization.

78351845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109612.

The product of its digits is 134400, while the sum is 41.

The square root of 78351845 is about 8851.6577543418. The cubic root of 78351845 is about 427.9073463076.

The spelling of 78351845 in words is "seventy-eight million, three hundred fifty-one thousand, eight hundred forty-five".