1986745979045 has 16 divisors (see below), whose sum is σ = 2393757482688. Its totient is φ = 1582965943680.

The previous prime is 1986745978991. The next prime is 1986745979047. The reversal of 1986745979045 is 5409795476891.

It is not a de Polignac number, because 1986745979045 - 2¹⁴ = 1986745962661 is a prime.

It is a super-2 number, since 2×1986745979045² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986745979047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 818810 + ... + 2154980.

It is an arithmetic number, because the mean of its divisors is an integer number (149609842668).

Almost surely, 2^{1986745979045} is an apocalyptic number.

It is an amenable number.

1986745979045 is a deficient number, since it is larger than the sum of its proper divisors (407011503643).

1986745979045 is a wasteful number, since it uses less digits than its factorization.

1986745979045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337380.

The product of its (nonzero) digits is 685843200, while the sum is 74.

The spelling of 1986745979045 in words is "one trillion, nine hundred eighty-six billion, seven hundred forty-five million, nine hundred seventy-nine thousand, forty-five".