2551550333440 has 80 divisors (see below), whose sum is σ = 6203906406720. Its totient is φ = 1006245130240.

The previous prime is 2551550333383. The next prime is 2551550333443. The reversal of 2551550333440 is 443330551552.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2551550333393 and 2551550333402.

It is not an unprimeable number, because it can be changed into a prime (2551550333443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6837250 + ... + 7200769.

It is an arithmetic number, because the mean of its divisors is an integer number (77548830084).

Almost surely, 2^{2551550333440} is an apocalyptic number.

2551550333440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551550333440 is an abundant number, since it is smaller than the sum of its proper divisors (3652356073280).

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

2551550333440 is an equidigital number, since it uses as much as digits as its factorization.

2551550333440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14038113 (or 14038097 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 40.

Adding to 2551550333440 its reverse (443330551552), we get a palindrome (2994880884992).

The spelling of 2551550333440 in words is "two trillion, five hundred fifty-one billion, five hundred fifty million, three hundred thirty-three thousand, four hundred forty".