1977771352 has 16 divisors (see below), whose sum is σ = 3709109160. Its totient is φ = 988675584.

The previous prime is 1977771349. The next prime is 1977771409. The reversal of 1977771352 is 2531777791.

It is a junction number, because it is equal to n+sod(n) for n = 1977771296 and 1977771305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18168 + ... + 65464.

Almost surely, 2^1977771352 is an apocalyptic number.

It is an amenable number.

1977771352 is a deficient number, since it is larger than the sum of its proper divisors (1731337808).

1977771352 is a wasteful number, since it uses less digits than its factorization.

1977771352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52530 (or 52526 counting only the distinct ones).

The product of its digits is 648270, while the sum is 49.

The square root of 1977771352 is about 44472.1413021680. The cubic root of 1977771352 is about 1255.2359258685.

The spelling of 1977771352 in words is "one billion, nine hundred seventy-seven million, seven hundred seventy-one thousand, three hundred fifty-two".