551461103640 has 128 divisors (see below), whose sum is σ = 1845193996800. Its totient is φ = 146497069440.

The previous prime is 551461103623. The next prime is 551461103659. The reversal of 551461103640 is 46301164155.

551461103640 is a `hidden beast` number, since 5 + 5 + 1 + 4 + 6 + 1 + 1 + 0 + 3 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 551461103595 and 551461103604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 686706 + ... + 1254785.

It is an arithmetic number, because the mean of its divisors is an integer number (14415578100).

Almost surely, 2^551461103640 is an apocalyptic number.

It is an amenable number.

551461103640 is an abundant number, since it is smaller than the sum of its proper divisors (1293732893160).

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

551461103640 is a wasteful number, since it uses less digits than its factorization.

551461103640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941774 (or 1941764 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 551461103640 its reverse (46301164155), we get a palindrome (597762267795).

The spelling of 551461103640 in words is "five hundred fifty-one billion, four hundred sixty-one million, one hundred three thousand, six hundred forty".