1387808654427 has 48 divisors (see below), whose sum is σ = 2166227376768. Its totient is φ = 851105525760.

The previous prime is 1387808654423. The next prime is 1387808654443. The reversal of 1387808654427 is 7244568087831.

It is a happy number.

1387808654427 is a `hidden beast` number, since 1 + 3 + 8 + 7 + 8 + 0 + 86 + 544 + 2 + 7 = 666.

It is not a de Polignac number, because 1387808654427 - 2² = 1387808654423 is a prime.

It is a super-2 number, since 2×1387808654427² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1387808654423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 100261027 + ... + 100274867.

It is an arithmetic number, because the mean of its divisors is an integer number (45129737016).

Almost surely, 2^{1387808654427} is an apocalyptic number.

1387808654427 is a deficient number, since it is larger than the sum of its proper divisors (778418722341).

1387808654427 is a wasteful number, since it uses less digits than its factorization.

1387808654427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16740 (or 16737 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 63.

The spelling of 1387808654427 in words is "one trillion, three hundred eighty-seven billion, eight hundred eight million, six hundred fifty-four thousand, four hundred twenty-seven".