1977355552 has 12 divisors (see below), whose sum is σ = 3892918806. Its totient is φ = 988677760.

The previous prime is 1977355547. The next prime is 1977355571. The reversal of 1977355552 is 2555537791.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1057810576 + 919544976 = 32524^2 + 30324^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1977355496 and 1977355505.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30896149 + ... + 30896212.

Almost surely, 2^1977355552 is an apocalyptic number.

It is an amenable number.

1977355552 is a deficient number, since it is larger than the sum of its proper divisors (1915563254).

1977355552 is an equidigital number, since it uses as much as digits as its factorization.

1977355552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61792371 (or 61792363 counting only the distinct ones).

The product of its digits is 1653750, while the sum is 49.

The square root of 1977355552 is about 44467.4662196982. The cubic root of 1977355552 is about 1255.1479541762.

The spelling of 1977355552 in words is "one billion, nine hundred seventy-seven million, three hundred fifty-five thousand, five hundred fifty-two".