6939722542 has 4 divisors (see below), whose sum is σ = 10409583816. Its totient is φ = 3469861270.

The previous prime is 6939722513. The next prime is 6939722549. The reversal of 6939722542 is 2452279396.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6939722549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1734930634 + ... + 1734930637.

It is an arithmetic number, because the mean of its divisors is an integer number (2602395954).

Almost surely, 2^6939722542 is an apocalyptic number.

6939722542 is a deficient number, since it is larger than the sum of its proper divisors (3469861274).

6939722542 is a wasteful number, since it uses less digits than its factorization.

6939722542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469861273.

The product of its digits is 1632960, while the sum is 49.

The square root of 6939722542 is about 83304.9971010143. The cubic root of 6939722542 is about 1907.4245545586.

The spelling of 6939722542 in words is "six billion, nine hundred thirty-nine million, seven hundred twenty-two thousand, five hundred forty-two".