78824372551 has 8 divisors (see below), whose sum is σ = 79268038304. Its totient is φ = 78380796960.

The previous prime is 78824372537. The next prime is 78824372581. The reversal of 78824372551 is 15527342887.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78824372551 - 2²³ = 78815983943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78824372531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2549950 + ... + 2580676.

It is an arithmetic number, because the mean of its divisors is an integer number (9908504788).

Almost surely, 2^78824372551 is an apocalyptic number.

78824372551 is a deficient number, since it is larger than the sum of its proper divisors (443665753).

78824372551 is a wasteful number, since it uses less digits than its factorization.

78824372551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45081.

The product of its digits is 3763200, while the sum is 52.

The spelling of 78824372551 in words is "seventy-eight billion, eight hundred twenty-four million, three hundred seventy-two thousand, five hundred fifty-one".