78552451 has 4 divisors (see below), whose sum is σ = 78610000. Its totient is φ = 78494904.

The previous prime is 78552437. The next prime is 78552469. The reversal of 78552451 is 15425587.

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

It is a cyclic number.

It is not a de Polignac number, because 78552451 - 2¹³ = 78544259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78552451.

It is not an unprimeable number, because it can be changed into a prime (78552401) 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, 26676 + ... + 29473.

It is an arithmetic number, because the mean of its divisors is an integer number (19652500).

Almost surely, 2^78552451 is an apocalyptic number.

78552451 is a deficient number, since it is larger than the sum of its proper divisors (57549).

78552451 is a wasteful number, since it uses less digits than its factorization.

78552451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57548.

The product of its digits is 56000, while the sum is 37.

The square root of 78552451 is about 8862.9820602323. The cubic root of 78552451 is about 428.2722286964.

It can be divided in two parts, 78552 and 451, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 78552451 in words is "seventy-eight million, five hundred fifty-two thousand, four hundred fifty-one".