1377445642640 has 40 divisors (see below), whose sum is σ = 3202636000320. Its totient is φ = 550965374336.

The previous prime is 1377445642619. The next prime is 1377445642687. The reversal of 1377445642640 is 462465447731.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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, 3714791 + ... + 4068729.

It is an arithmetic number, because the mean of its divisors is an integer number (80065900008).

Almost surely, 2^{1377445642640} is an apocalyptic number.

1377445642640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1377445642640 is an abundant number, since it is smaller than the sum of its proper divisors (1825190357680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1377445642640 is a wasteful number, since it uses less digits than its factorization.

1377445642640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402599 (or 402593 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 53.

The spelling of 1377445642640 in words is "one trillion, three hundred seventy-seven billion, four hundred forty-five million, six hundred forty-two thousand, six hundred forty".