2640252426 has 32 divisors (see below), whose sum is σ = 6352488960. Its totient is φ = 714654576.

The previous prime is 2640252389. The next prime is 2640252487. The reversal of 2640252426 is 6242520462.

2640252426 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1653496 + ... + 1655091.

It is an arithmetic number, because the mean of its divisors is an integer number (198515280).

Almost surely, 2^2640252426 is an apocalyptic number.

2640252426 is an abundant number, since it is smaller than the sum of its proper divisors (3712236534).

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

2640252426 is a wasteful number, since it uses less digits than its factorization.

2640252426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308618.

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 2640252426 is about 51383.3866731262. The cubic root of 2640252426 is about 1382.1286943583.

Adding to 2640252426 its reverse (6242520462), we get a palindrome (8882772888).

The spelling of 2640252426 in words is "two billion, six hundred forty million, two hundred fifty-two thousand, four hundred twenty-six".