1377561441 has 16 divisors (see below), whose sum is σ = 1881547200. Its totient is φ = 896203008.

The previous prime is 1377561433. The next prime is 1377561443. The reversal of 1377561441 is 1441657731.

It is a happy number.

It is not a de Polignac number, because 1377561441 - 2³ = 1377561433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1377561441.

It is not an unprimeable number, because it can be changed into a prime (1377561443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4156 + ... + 52653.

It is an arithmetic number, because the mean of its divisors is an integer number (117596700).

Almost surely, 2^1377561441 is an apocalyptic number.

It is an amenable number.

1377561441 is a deficient number, since it is larger than the sum of its proper divisors (503985759).

1377561441 is a wasteful number, since it uses less digits than its factorization.

1377561441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57008.

The product of its digits is 70560, while the sum is 39.

The square root of 1377561441 is about 37115.5148287074. The cubic root of 1377561441 is about 1112.6801131771.

The spelling of 1377561441 in words is "one billion, three hundred seventy-seven million, five hundred sixty-one thousand, four hundred forty-one".