1377758787640 has 32 divisors (see below), whose sum is σ = 3100085044560. Its totient is φ = 551080800000.

The previous prime is 1377758787589. The next prime is 1377758787709. The reversal of 1377758787640 is 467878577731.

It is a self number, because there is not a number n which added to its sum of digits gives 1377758787640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290140 + ... + 1685140.

Almost surely, 2^{1377758787640} is an apocalyptic number.

1377758787640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1377758787640 is an abundant number, since it is smaller than the sum of its proper divisors (1722326256920).

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

1377758787640 is a wasteful number, since it uses less digits than its factorization.

1377758787640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419703 (or 1419699 counting only the distinct ones).

The product of its (nonzero) digits is 387233280, while the sum is 70.

The spelling of 1377758787640 in words is "one trillion, three hundred seventy-seven billion, seven hundred fifty-eight million, seven hundred eighty-seven thousand, six hundred forty".