6942551615 has 4 divisors (see below), whose sum is σ = 8331061944. Its totient is φ = 5554041288.

The previous prime is 6942551563. The next prime is 6942551617. The reversal of 6942551615 is 5161552496.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6942551615 is a prime.

It is a super-4 number, since 4×6942551615⁴ (a number of 40 digits) contains 4444 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 (6942551617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694255157 + ... + 694255166.

It is an arithmetic number, because the mean of its divisors is an integer number (2082765486).

Almost surely, 2^6942551615 is an apocalyptic number.

6942551615 is a deficient number, since it is larger than the sum of its proper divisors (1388510329).

6942551615 is a wasteful number, since it uses less digits than its factorization.

6942551615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388510328.

The product of its digits is 324000, while the sum is 44.

The square root of 6942551615 is about 83321.9755826757. The cubic root of 6942551615 is about 1907.6837152650.

The spelling of 6942551615 in words is "six billion, nine hundred forty-two million, five hundred fifty-one thousand, six hundred fifteen".