2651251278 has 16 divisors (see below), whose sum is σ = 5710387536. Its totient is φ = 815769600.

The previous prime is 2651251249. The next prime is 2651251283. The reversal of 2651251278 is 8721521562.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16995123 + ... + 16995278.

It is an arithmetic number, because the mean of its divisors is an integer number (356899221).

Almost surely, 2^2651251278 is an apocalyptic number.

2651251278 is an abundant number, since it is smaller than the sum of its proper divisors (3059136258).

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

2651251278 is a wasteful number, since it uses less digits than its factorization.

2651251278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33990419.

The product of its digits is 67200, while the sum is 39.

The square root of 2651251278 is about 51490.3027569270. The cubic root of 2651251278 is about 1384.0452747699.

The spelling of 2651251278 in words is "two billion, six hundred fifty-one million, two hundred fifty-one thousand, two hundred seventy-eight".