78334747451 has 4 divisors (see below), whose sum is σ = 78335588352. Its totient is φ = 78333906552.

The previous prime is 78334747433. The next prime is 78334747483. The reversal of 78334747451 is 15474743387.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78334747451 is a prime.

It is a super-2 number, since 2×78334747451² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78334747393 and 78334747402.

It is not an unprimeable number, because it can be changed into a prime (78334747951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260411 + ... + 473796.

It is an arithmetic number, because the mean of its divisors is an integer number (19583897088).

Almost surely, 2^78334747451 is an apocalyptic number.

78334747451 is a deficient number, since it is larger than the sum of its proper divisors (840901).

78334747451 is a wasteful number, since it uses less digits than its factorization.

78334747451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840900.

The product of its digits is 7902720, while the sum is 53.

The spelling of 78334747451 in words is "seventy-eight billion, three hundred thirty-four million, seven hundred forty-seven thousand, four hundred fifty-one".