2651991740 has 48 divisors (see below), whose sum is σ = 5738221440. Its totient is φ = 1029050880.

The previous prime is 2651991731. The next prime is 2651991743. The reversal of 2651991740 is 471991562.

2651991740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2651991691 and 2651991700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2651991743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80285 + ... + 108395.

It is an arithmetic number, because the mean of its divisors is an integer number (119546280).

Almost surely, 2^2651991740 is an apocalyptic number.

2651991740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2651991740 is an abundant number, since it is smaller than the sum of its proper divisors (3086229700).

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

2651991740 is a wasteful number, since it uses less digits than its factorization.

2651991740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28262 (or 28260 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 2651991740 is about 51497.4925603179. The cubic root of 2651991740 is about 1384.1741117393.

The spelling of 2651991740 in words is "two billion, six hundred fifty-one million, nine hundred ninety-one thousand, seven hundred forty".