78033263551 has 4 divisors (see below), whose sum is σ = 80142270712. Its totient is φ = 75924256392.

The previous prime is 78033263459. The next prime is 78033263557. The reversal of 78033263551 is 15536233087.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78033263551 - 2⁹ = 78033263039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78033263498 and 78033263507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78033263557) 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, 1054503525 + ... + 1054503598.

It is an arithmetic number, because the mean of its divisors is an integer number (20035567678).

Almost surely, 2^78033263551 is an apocalyptic number.

78033263551 is a deficient number, since it is larger than the sum of its proper divisors (2109007161).

78033263551 is a wasteful number, since it uses less digits than its factorization.

78033263551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109007160.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 78033263551 in words is "seventy-eight billion, thirty-three million, two hundred sixty-three thousand, five hundred fifty-one".