78540455 has 16 divisors (see below), whose sum is σ = 110625600. Its totient is φ = 52399872.

The previous prime is 78540401. The next prime is 78540463. The reversal of 78540455 is 55404587.

It is a de Polignac number, because none of the positive numbers 2^k-78540455 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29030 + ... + 31619.

It is an arithmetic number, because the mean of its divisors is an integer number (6914100).

Almost surely, 2^78540455 is an apocalyptic number.

78540455 is a deficient number, since it is larger than the sum of its proper divisors (32085145).

78540455 is a wasteful number, since it uses less digits than its factorization.

78540455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60698.

The product of its (nonzero) digits is 112000, while the sum is 38.

The square root of 78540455 is about 8862.3052870007. The cubic root of 78540455 is about 428.2504266387.

The spelling of 78540455 in words is "seventy-eight million, five hundred forty thousand, four hundred fifty-five".