1377442745 has 32 divisors (see below), whose sum is σ = 1978836480. Its totient is φ = 899965440.

The previous prime is 1377442741. The next prime is 1377442763. The reversal of 1377442745 is 5472447731.

It is not a de Polignac number, because 1377442745 - 2² = 1377442741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1377442696 and 1377442705.

It is not an unprimeable number, because it can be changed into a prime (1377442741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213365 + ... + 219725.

It is an arithmetic number, because the mean of its divisors is an integer number (61838640).

Almost surely, 2^1377442745 is an apocalyptic number.

It is an amenable number.

1377442745 is a deficient number, since it is larger than the sum of its proper divisors (601393735).

1377442745 is a wasteful number, since it uses less digits than its factorization.

1377442745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6665.

The product of its digits is 658560, while the sum is 44.

The square root of 1377442745 is about 37113.9157864001. The cubic root of 1377442745 is about 1112.6481546577.

The spelling of 1377442745 in words is "one billion, three hundred seventy-seven million, four hundred forty-two thousand, seven hundred forty-five".