1377487681970 has 16 divisors (see below), whose sum is σ = 2546490742488. Its totient is φ = 536103313920.

The previous prime is 1377487681967. The next prime is 1377487681979. The reversal of 1377487681970 is 791867847731.

It can be written as a sum of positive squares in 4 ways, for example, as 1124747212681 + 252740469289 = 1060541^2 + 502733^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1377487681970.

It is not an unprimeable number, because it can be changed into a prime (1377487681979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1861469471 + ... + 1861470210.

Almost surely, 2^{1377487681970} is an apocalyptic number.

1377487681970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1377487681970 is a deficient number, since it is larger than the sum of its proper divisors (1169003060518).

1377487681970 is a wasteful number, since it uses less digits than its factorization.

1377487681970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722939725.

The product of its (nonzero) digits is 99574272, while the sum is 68.

The spelling of 1377487681970 in words is "one trillion, three hundred seventy-seven billion, four hundred eighty-seven million, six hundred eighty-one thousand, nine hundred seventy".