78795851 has 4 divisors (see below), whose sum is σ = 78979104. Its totient is φ = 78612600.

The previous prime is 78795839. The next prime is 78795911. The reversal of 78795851 is 15859787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15859787 = 467 ⋅33961.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78795851 is a prime.

It is a super-2 number, since 2×78795851² = 12417572269628402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78795851.

It is not an unprimeable number, because it can be changed into a prime (78795811) 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, 90980 + ... + 91841.

It is an arithmetic number, because the mean of its divisors is an integer number (19744776).

Almost surely, 2^78795851 is an apocalyptic number.

78795851 is a deficient number, since it is larger than the sum of its proper divisors (183253).

78795851 is a wasteful number, since it uses less digits than its factorization.

78795851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183252.

The product of its digits is 705600, while the sum is 50.

The square root of 78795851 is about 8876.7027099030. The cubic root of 78795851 is about 428.7141159438.

The spelling of 78795851 in words is "seventy-eight million, seven hundred ninety-five thousand, eight hundred fifty-one".