6556400252 has 24 divisors (see below), whose sum is σ = 11682207600. Its totient is φ = 3218760576.

The previous prime is 6556400209. The next prime is 6556400261. The reversal of 6556400252 is 2520046556.

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, 185024 + ... + 217592.

It is an arithmetic number, because the mean of its divisors is an integer number (486758650).

Almost surely, 2^6556400252 is an apocalyptic number.

It is an amenable number.

6556400252 is a deficient number, since it is larger than the sum of its proper divisors (5125807348).

6556400252 is a wasteful number, since it uses less digits than its factorization.

6556400252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33485 (or 33483 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 6556400252 is about 80971.6015155931. The cubic root of 6556400252 is about 1871.6378505225.

The spelling of 6556400252 in words is "six billion, five hundred fifty-six million, four hundred thousand, two hundred fifty-two".