1377641644 has 24 divisors (see below), whose sum is σ = 2432933888. Its totient is φ = 682531920.

The previous prime is 1377641641. The next prime is 1377641651. The reversal of 1377641644 is 4461467731.

It is a self number, because there is not a number n which added to its sum of digits gives 1377641644.

It is not an unprimeable number, because it can be changed into a prime (1377641641) 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 7 ways as a sum of consecutive naturals, for example, 624247 + ... + 626449.

Almost surely, 2^1377641644 is an apocalyptic number.

It is an amenable number.

1377641644 is a deficient number, since it is larger than the sum of its proper divisors (1055292244).

1377641644 is a wasteful number, since it uses less digits than its factorization.

1377641644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3565 (or 3563 counting only the distinct ones).

The product of its digits is 338688, while the sum is 43.

The square root of 1377641644 is about 37116.5952641133. The cubic root of 1377641644 is about 1112.7017065398.

The spelling of 1377641644 in words is "one billion, three hundred seventy-seven million, six hundred forty-one thousand, six hundred forty-four".