1377377462561 has 4 divisors (see below), whose sum is σ = 1379075832624. Its totient is φ = 1375679092500.

The previous prime is 1377377462459. The next prime is 1377377462567. The reversal of 1377377462561 is 1652647737731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1377377462561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1377377462561.

It is not an unprimeable number, because it can be changed into a prime (1377377462567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849183815 + ... + 849185436.

It is an arithmetic number, because the mean of its divisors is an integer number (344768958156).

Almost surely, 2^{1377377462561} is an apocalyptic number.

It is an amenable number.

1377377462561 is a deficient number, since it is larger than the sum of its proper divisors (1698370063).

1377377462561 is an equidigital number, since it uses as much as digits as its factorization.

1377377462561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698370062.

The product of its digits is 31116960, while the sum is 59.

The spelling of 1377377462561 in words is "one trillion, three hundred seventy-seven billion, three hundred seventy-seven million, four hundred sixty-two thousand, five hundred sixty-one".