6550400400 has 60 divisors (see below), whose sum is σ = 20983119792. Its totient is φ = 1746773120.

The previous prime is 6550400377. The next prime is 6550400411. The reversal of 6550400400 is 40040556.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2728134 + ... + 2730533.

Almost surely, 2^6550400400 is an apocalyptic number.

6550400400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6550400400 is an abundant number, since it is smaller than the sum of its proper divisors (14432719392).

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

6550400400 is a wasteful number, since it uses less digits than its factorization.

6550400400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5458688 (or 5458677 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 6550400400 is about 80934.5439228516. The cubic root of 6550400400 is about 1871.0667557729.

Adding to 6550400400 its reverse (40040556), we get a palindrome (6590440956).

The spelling of 6550400400 in words is "six billion, five hundred fifty million, four hundred thousand, four hundred".