1377542817 has 12 divisors (see below), whose sum is σ = 2274039040. Its totient is φ = 787167288.

The previous prime is 1377542779. The next prime is 1377542857. The reversal of 1377542817 is 7182457731.

It is not a de Polignac number, because 1377542817 - 2¹⁰ = 1377541793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1377542857) 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 11 ways as a sum of consecutive naturals, for example, 10932817 + ... + 10932942.

Almost surely, 2^1377542817 is an apocalyptic number.

It is an amenable number.

1377542817 is a deficient number, since it is larger than the sum of its proper divisors (896496223).

1377542817 is a wasteful number, since it uses less digits than its factorization.

1377542817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21865772 (or 21865769 counting only the distinct ones).

The product of its digits is 329280, while the sum is 45.

The square root of 1377542817 is about 37115.2639354754. The cubic root of 1377542817 is about 1112.6750988460.

The spelling of 1377542817 in words is "one billion, three hundred seventy-seven million, five hundred forty-two thousand, eight hundred seventeen".