15551443442730 has 64 divisors (see below), whose sum is σ = 40450516057728. Its totient is φ = 3803665132800.

The previous prime is 15551443442669. The next prime is 15551443442741. The reversal of 15551443442730 is 3724434415551.

It is a self number, because there is not a number n which added to its sum of digits gives 15551443442730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126930796 + ... + 127053255.

It is an arithmetic number, because the mean of its divisors is an integer number (632039313402).

Almost surely, 2^{15551443442730} is an apocalyptic number.

15551443442730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15551443442730 is an abundant number, since it is smaller than the sum of its proper divisors (24899072614998).

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

15551443442730 is a wasteful number, since it uses less digits than its factorization.

15551443442730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253984231.

The product of its (nonzero) digits is 4032000, while the sum is 48.

The spelling of 15551443442730 in words is "fifteen trillion, five hundred fifty-one billion, four hundred forty-three million, four hundred forty-two thousand, seven hundred thirty".