1977354771764 has 24 divisors (see below), whose sum is σ = 3507869517768. Its totient is φ = 975107082240.

The previous prime is 1977354771757. The next prime is 1977354771779. The reversal of 1977354771764 is 4671774537791.

It can be written as a sum of positive squares in 4 ways, for example, as 359930403364 + 1617424368400 = 599942^2 + 1271780^2 .

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1977354771694 and 1977354771703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14443394 + ... + 14579654.

It is an arithmetic number, because the mean of its divisors is an integer number (146161229907).

Almost surely, 2^{1977354771764} is an apocalyptic number.

It is an amenable number.

1977354771764 is a deficient number, since it is larger than the sum of its proper divisors (1530514746004).

1977354771764 is a wasteful number, since it uses less digits than its factorization.

1977354771764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186035 (or 186033 counting only the distinct ones).

The product of its digits is 217818720, while the sum is 68.

The spelling of 1977354771764 in words is "one trillion, nine hundred seventy-seven billion, three hundred fifty-four million, seven hundred seventy-one thousand, seven hundred sixty-four".