78061453 has 4 divisors (see below), whose sum is σ = 80171260. Its totient is φ = 75951648.

The previous prime is 78061409. The next prime is 78061457. The reversal of 78061453 is 35416087.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64208169 + 13853284 = 8013^2 + 3722^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78061453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78061457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1054848 + ... + 1054921.

It is an arithmetic number, because the mean of its divisors is an integer number (20042815).

Almost surely, 2^78061453 is an apocalyptic number.

It is an amenable number.

78061453 is a deficient number, since it is larger than the sum of its proper divisors (2109807).

78061453 is a wasteful number, since it uses less digits than its factorization.

78061453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109806.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 78061453 is about 8835.2392723683. The cubic root of 78061453 is about 427.3780471308.

The spelling of 78061453 in words is "seventy-eight million, sixty-one thousand, four hundred fifty-three".