1551565541512 has 96 divisors (see below), whose sum is σ = 3405815946720. Its totient is φ = 660710856960.

The previous prime is 1551565541473. The next prime is 1551565541531. The reversal of 1551565541512 is 2151455651551.

It is a super-2 number, since 2×1551565541512² (a number of 25 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 51018103 + ... + 51048505.

It is an arithmetic number, because the mean of its divisors is an integer number (35477249445).

Almost surely, 2^{1551565541512} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551565541512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1702907973360).

1551565541512 is an abundant number, since it is smaller than the sum of its proper divisors (1854250405208).

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

1551565541512 is a wasteful number, since it uses less digits than its factorization.

1551565541512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31251 (or 31240 counting only the distinct ones).

The product of its digits is 750000, while the sum is 46.

The spelling of 1551565541512 in words is "one trillion, five hundred fifty-one billion, five hundred sixty-five million, five hundred forty-one thousand, five hundred twelve".