1005540281551 has 8 divisors (see below), whose sum is σ = 1082950800624. Its totient is φ = 928138514880.

The previous prime is 1005540281539. The next prime is 1005540281591. The reversal of 1005540281551 is 1551820455001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1005540281551 - 2²⁹ = 1005003410639 is a prime.

It is a super-2 number, since 2×1005540281551² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1005540281551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005540281591) 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, 1948510 + ... + 2409931.

It is an arithmetic number, because the mean of its divisors is an integer number (135368850078).

Almost surely, 2^{1005540281551} is an apocalyptic number.

1005540281551 is a deficient number, since it is larger than the sum of its proper divisors (77410519073).

1005540281551 is a wasteful number, since it uses less digits than its factorization.

1005540281551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4376201.

The product of its (nonzero) digits is 40000, while the sum is 37.

The spelling of 1005540281551 in words is "one trillion, five billion, five hundred forty million, two hundred eighty-one thousand, five hundred fifty-one".