377985656589781 has 8 divisors (see below), whose sum is σ = 378735898296728. Its totient is φ = 377235817920000.

The previous prime is 377985656589707. The next prime is 377985656590021. The reversal of 377985656589781 is 187985656589773.

It can be written as a sum of positive squares in 4 ways, for example, as 4036462719025 + 373949193870756 = 2009095^2 + 19337766^2 .

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 377985656589781 - 2²¹ = 377985654492629 is a prime.

It is a super-2 number, since 2×377985656589781² (a number of 30 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 377985656589781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (377985656589701) 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, 98881710 + ... + 102633151.

It is an arithmetic number, because the mean of its divisors is an integer number (47341987287091).

Almost surely, 2^{377985656589781} is an apocalyptic number.

It is an amenable number.

377985656589781 is a deficient number, since it is larger than the sum of its proper divisors (750241706947).

377985656589781 is a wasteful number, since it uses less digits than its factorization.

377985656589781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201518583.

The product of its digits is 192036096000, while the sum is 94.

The spelling of 377985656589781 in words is "three hundred seventy-seven trillion, nine hundred eighty-five billion, six hundred fifty-six million, five hundred eighty-nine thousand, seven hundred eighty-one".