6942551616 has 336 divisors, whose sum is σ = 26720523648. Its totient is φ = 1664409600.

The previous prime is 6942551563. The next prime is 6942551617. The reversal of 6942551616 is 6161552496.

6942551616 is a `hidden beast` number, since 6 + 9 + 4 + 25 + 5 + 1 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a super-2 number, since 2×6942551616² = 96398045881648422912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6942551617) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 570556 + ... + 582596.

It is an arithmetic number, because the mean of its divisors is an integer number (79525368).

Almost surely, 2^6942551616 is an apocalyptic number.

6942551616 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6942551616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13360261824).

6942551616 is an abundant number, since it is smaller than the sum of its proper divisors (19777972032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6942551616 is a wasteful number, since it uses less digits than its factorization.

6942551616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12090 (or 12077 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 6942551616 is about 83321.9755886765. The cubic root of 6942551616 is about 1907.6837153566.

The spelling of 6942551616 in words is "six billion, nine hundred forty-two million, five hundred fifty-one thousand, six hundred sixteen".