78355751783 has 8 divisors (see below), whose sum is σ = 79867241568. Its totient is φ = 76845487264.

The previous prime is 78355751779. The next prime is 78355751797. The reversal of 78355751783 is 38715755387.

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 78355751783 - 2² = 78355751779 is a prime.

It is a super-2 number, since 2×78355751783² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78355751723) 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, 176660 + ... + 433497.

It is an arithmetic number, because the mean of its divisors is an integer number (9983405196).

Almost surely, 2^78355751783 is an apocalyptic number.

78355751783 is a deficient number, since it is larger than the sum of its proper divisors (1511489785).

78355751783 is a wasteful number, since it uses less digits than its factorization.

78355751783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612633.

The product of its digits is 24696000, while the sum is 59.

The spelling of 78355751783 in words is "seventy-eight billion, three hundred fifty-five million, seven hundred fifty-one thousand, seven hundred eighty-three".