78754210465 has 24 divisors (see below), whose sum is σ = 110003833512. Its totient is φ = 53968803840.

The previous prime is 78754210439. The next prime is 78754210471. The reversal of 78754210465 is 56401245787.

It can be written as a sum of positive squares in 4 ways, for example, as 134536801 + 78619673664 = 11599^2 + 280392^2 .

It is not a de Polignac number, because 78754210465 - 2²³ = 78745821857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 290625 + ... + 491905.

It is an arithmetic number, because the mean of its divisors is an integer number (4583493063).

Almost surely, 2^78754210465 is an apocalyptic number.

It is an amenable number.

78754210465 is a deficient number, since it is larger than the sum of its proper divisors (31249623047).

78754210465 is a wasteful number, since it uses less digits than its factorization.

78754210465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202897 (or 202890 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 49.

The spelling of 78754210465 in words is "seventy-eight billion, seven hundred fifty-four million, two hundred ten thousand, four hundred sixty-five".