1377487681969 has 8 divisors (see below), whose sum is σ = 1575257417408. Its totient is φ = 1179964391760.

The previous prime is 1377487681967. The next prime is 1377487681979. The reversal of 1377487681969 is 9691867847731.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1377487681969 - 2¹ = 1377487681967 is a prime.

It is a super-2 number, since 2×1377487681969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1377487681895 and 1377487681904.

It is not an unprimeable number, because it can be changed into a prime (1377487681967) 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, 61599327 + ... + 61621684.

It is an arithmetic number, because the mean of its divisors is an integer number (196907177176).

Almost surely, 2^{1377487681969} is an apocalyptic number.

It is an amenable number.

1377487681969 is a deficient number, since it is larger than the sum of its proper divisors (197769735439).

1377487681969 is a wasteful number, since it uses less digits than its factorization.

1377487681969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123222615.

The product of its digits is 768144384, while the sum is 76.

The spelling of 1377487681969 in words is "one trillion, three hundred seventy-seven billion, four hundred eighty-seven million, six hundred eighty-one thousand, nine hundred sixty-nine".