78254891481 has 16 divisors (see below), whose sum is σ = 118279999040. Its totient is φ = 45622284480.

The previous prime is 78254891459. The next prime is 78254891483. The reversal of 78254891481 is 18419845287.

It is not a de Polignac number, because 78254891481 - 2⁷ = 78254891353 is a prime.

It is a super-2 number, since 2×78254891481² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78254891483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52802830 + ... + 52804311.

It is an arithmetic number, because the mean of its divisors is an integer number (7392499940).

Almost surely, 2^78254891481 is an apocalyptic number.

It is an amenable number.

78254891481 is a deficient number, since it is larger than the sum of its proper divisors (40025107559).

78254891481 is a wasteful number, since it uses less digits than its factorization.

78254891481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105607176.

The product of its digits is 5160960, while the sum is 57.

The spelling of 78254891481 in words is "seventy-eight billion, two hundred fifty-four million, eight hundred ninety-one thousand, four hundred eighty-one".