69439116783 has 16 divisors (see below), whose sum is σ = 99724887680. Its totient is φ = 42836369184.

The previous prime is 69439116781. The next prime is 69439116847. The reversal of 69439116783 is 38761193496.

It is a happy number.

It is not a de Polignac number, because 69439116783 - 2¹ = 69439116781 is a prime.

It is a super-2 number, since 2×69439116783² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69439116781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14163016 + ... + 14167917.

It is an arithmetic number, because the mean of its divisors is an integer number (6232805480).

Almost surely, 2^69439116783 is an apocalyptic number.

69439116783 is a deficient number, since it is larger than the sum of its proper divisors (30285770897).

69439116783 is a wasteful number, since it uses less digits than its factorization.

69439116783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28330998.

The product of its digits is 5878656, while the sum is 57.

The spelling of 69439116783 in words is "sixty-nine billion, four hundred thirty-nine million, one hundred sixteen thousand, seven hundred eighty-three".