1377505042640 has 40 divisors (see below), whose sum is σ = 3205717988328. Its totient is φ = 550482659840.

The previous prime is 1377505042609. The next prime is 1377505042687. The reversal of 1377505042640 is 462405057731.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4352304784 + 1373152737856 = 65972^2 + 1171816^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1377505042591 and 1377505042600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8029547 + ... + 8199306.

Almost surely, 2^{1377505042640} is an apocalyptic number.

1377505042640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1377505042640 is an abundant number, since it is smaller than the sum of its proper divisors (1828212945688).

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

1377505042640 is a wasteful number, since it uses less digits than its factorization.

1377505042640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16229927 (or 16229921 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 1377505042640 in words is "one trillion, three hundred seventy-seven billion, five hundred five million, forty-two thousand, six hundred forty".