78276455 has 4 divisors (see below), whose sum is σ = 93931752. Its totient is φ = 62621160.

The previous prime is 78276433. The next prime is 78276463. The reversal of 78276455 is 55467287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55467287 = 677 ⋅81931.

It is not a de Polignac number, because 78276455 - 2¹⁶ = 78210919 is a prime.

It is a super-2 number, since 2×78276455² = 12254406814734050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7827641 + ... + 7827650.

It is an arithmetic number, because the mean of its divisors is an integer number (23482938).

Almost surely, 2^78276455 is an apocalyptic number.

78276455 is a deficient number, since it is larger than the sum of its proper divisors (15655297).

78276455 is a wasteful number, since it uses less digits than its factorization.

78276455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15655296.

The product of its digits is 470400, while the sum is 44.

The square root of 78276455 is about 8847.3982051222. The cubic root of 78276455 is about 427.7700583803.

The spelling of 78276455 in words is "seventy-eight million, two hundred seventy-six thousand, four hundred fifty-five".