377802061511161 has 9 divisors (see below), whose sum is σ = 439484189011311. Its totient is φ = 323830221815352.

The previous prime is 377802061511093. The next prime is 377802061511177. The reversal of 377802061511161 is 161115160208773.

The square root of 377802061511161 is 19437131.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 336911715074025 + 40890346437136 = 18355155^2 + 6394556^2 .

It is not a de Polignac number, because 377802061511161 - 2⁷ = 377802061511033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (377802061541161) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 134671551 + ... + 137448283.

Almost surely, 2^{377802061511161} is an apocalyptic number.

377802061511161 is the 19437131-st square number.

377802061511161 is the 9718566-th centered octagonal number.

It is an amenable number.

377802061511161 is a deficient number, since it is larger than the sum of its proper divisors (61682127500150).

377802061511161 is an frugal number, since it uses more digits than its factorization.

377802061511161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5553480 (or 2776740 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 49.

377802061511161 divided by its sum of digits (49) gives a square (7710246153289 = 2776733²).

The spelling of 377802061511161 in words is "three hundred seventy-seven trillion, eight hundred two billion, sixty-one million, five hundred eleven thousand, one hundred sixty-one".