1087784131545 has 96 divisors (see below), whose sum is σ = 1952717045760. Its totient is φ = 559594189440.

The previous prime is 1087784131529. The next prime is 1087784131547. The reversal of 1087784131545 is 5451314877801.

It is a happy number.

1087784131545 is a `hidden beast` number, since 1 + 0 + 8 + 7 + 7 + 84 + 13 + 1 + 545 = 666.

It is not a de Polignac number, because 1087784131545 - 2⁴ = 1087784131529 is a prime.

It is a super-2 number, since 2×1087784131545² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1087784131491 and 1087784131500.

It is not an unprimeable number, because it can be changed into a prime (1087784131547) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 986204464 + ... + 986205566.

It is an arithmetic number, because the mean of its divisors is an integer number (20340802560).

Almost surely, 2^{1087784131545} is an apocalyptic number.

1087784131545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1087784131545 is a deficient number, since it is larger than the sum of its proper divisors (864932914215).

1087784131545 is a wasteful number, since it uses less digits than its factorization.

1087784131545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2827 (or 2824 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 54.

The spelling of 1087784131545 in words is "one trillion, eighty-seven billion, seven hundred eighty-four million, one hundred thirty-one thousand, five hundred forty-five".