78801453 has 12 divisors (see below), whose sum is σ = 116901148. Its totient is φ = 51114240.

The previous prime is 78801449. The next prime is 78801509. The reversal of 78801453 is 35410887.

It can be written as a sum of positive squares in 2 ways, for example, as 70610409 + 8191044 = 8403^2 + 2862^2 .

It is not a de Polignac number, because 78801453 - 2² = 78801449 is a prime.

It is a super-2 number, since 2×78801453² = 12419337989822418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78801053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117988 + ... + 118653.

Almost surely, 2^78801453 is an apocalyptic number.

It is an amenable number.

78801453 is a deficient number, since it is larger than the sum of its proper divisors (38099695).

78801453 is a wasteful number, since it uses less digits than its factorization.

78801453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236684 (or 236681 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 78801453 is about 8877.0182493898. The cubic root of 78801453 is about 428.7242755294.

The spelling of 78801453 in words is "seventy-eight million, eight hundred one thousand, four hundred fifty-three".