69842439157 has 4 divisors (see below), whose sum is σ = 69844795020. Its totient is φ = 69840083296.

The previous prime is 69842439151. The next prime is 69842439197. The reversal of 69842439157 is 75193424896.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42058216561 + 27784222596 = 205081^2 + 166686^2 .

It is a cyclic number.

It is not a de Polignac number, because 69842439157 - 2³⁵ = 35482700789 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 (69842439151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1132888 + ... + 1192945.

It is an arithmetic number, because the mean of its divisors is an integer number (17461198755).

Almost surely, 2^69842439157 is an apocalyptic number.

It is an amenable number.

69842439157 is a deficient number, since it is larger than the sum of its proper divisors (2355863).

69842439157 is a wasteful number, since it uses less digits than its factorization.

69842439157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355862.

The product of its digits is 13063680, while the sum is 58.

The spelling of 69842439157 in words is "sixty-nine billion, eight hundred forty-two million, four hundred thirty-nine thousand, one hundred fifty-seven".