2511640997 has 2 divisors, whose sum is σ = 2511640998. Its totient is φ = 2511640996.

The previous prime is 2511640973. The next prime is 2511641053. The reversal of 2511640997 is 7990461152.

2511640997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2398452676 + 113188321 = 48974^2 + 10639^2 .

It is a cyclic number.

It is not a de Polignac number, because 2511640997 - 2⁶ = 2511640933 is a prime.

It is a super-2 number, since 2×2511640997² = 12616680995622308018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2511640907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1255820498 + 1255820499.

It is an arithmetic number, because the mean of its divisors is an integer number (1255820499).

Almost surely, 2^2511640997 is an apocalyptic number.

It is an amenable number.

2511640997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2511640997 is an equidigital number, since it uses as much as digits as its factorization.

2511640997 is an evil number, because the sum of its binary digits is even.

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

The square root of 2511640997 is about 50116.2747717745. The cubic root of 2511640997 is about 1359.3121155440.

The spelling of 2511640997 in words is "two billion, five hundred eleven million, six hundred forty thousand, nine hundred ninety-seven".