2551309068 has 144 divisors (see below), whose sum is σ = 7999254144. Its totient is φ = 623669760.

The previous prime is 2551309031. The next prime is 2551309081. The reversal of 2551309068 is 8609031552.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98355 + ... + 121557.

It is an arithmetic number, because the mean of its divisors is an integer number (55550376).

Almost surely, 2^2551309068 is an apocalyptic number.

2551309068 is a gapful number since it is divisible by the number (28) 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 2551309068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3999627072).

2551309068 is an abundant number, since it is smaller than the sum of its proper divisors (5447945076).

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

2551309068 is a wasteful number, since it uses less digits than its factorization.

2551309068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23252 (or 23243 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 2551309068 is about 50510.4847333700. The cubic root of 2551309068 is about 1366.4309517198.

The spelling of 2551309068 in words is "two billion, five hundred fifty-one million, three hundred nine thousand, sixty-eight".