78611745 has 8 divisors (see below), whose sum is σ = 125778816. Its totient is φ = 41926256.

The previous prime is 78611713. The next prime is 78611747. The reversal of 78611745 is 54711687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78611745 - 2⁵ = 78611713 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78611747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2620377 + ... + 2620406.

It is an arithmetic number, because the mean of its divisors is an integer number (15722352).

Almost surely, 2^78611745 is an apocalyptic number.

It is an amenable number.

78611745 is a deficient number, since it is larger than the sum of its proper divisors (47167071).

78611745 is a wasteful number, since it uses less digits than its factorization.

78611745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5240791.

The product of its digits is 47040, while the sum is 39.

The square root of 78611745 is about 8866.3264659046. The cubic root of 78611745 is about 428.3799596306.

The spelling of 78611745 in words is "seventy-eight million, six hundred eleven thousand, seven hundred forty-five".