1987132742455 has 32 divisors (see below), whose sum is σ = 2830998739968. Its totient is φ = 1310647430400.

The previous prime is 1987132742449. The next prime is 1987132742459. The reversal of 1987132742455 is 5542472317891.

It is not a de Polignac number, because 1987132742455 - 2¹⁷ = 1987132611383 is a prime.

It is a super-2 number, since 2×1987132742455² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1987132742455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987132742459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9649957 + ... + 9853726.

It is an arithmetic number, because the mean of its divisors is an integer number (88468710624).

Almost surely, 2^{1987132742455} is an apocalyptic number.

1987132742455 is a deficient number, since it is larger than the sum of its proper divisors (843865997513).

1987132742455 is a wasteful number, since it uses less digits than its factorization.

1987132742455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19503807.

The product of its digits is 16934400, while the sum is 58.

The spelling of 1987132742455 in words is "one trillion, nine hundred eighty-seven billion, one hundred thirty-two million, seven hundred forty-two thousand, four hundred fifty-five".