1386506904555 has 32 divisors (see below), whose sum is σ = 2223295893504. Its totient is φ = 737842525056.

The previous prime is 1386506904553. The next prime is 1386506904557. The reversal of 1386506904555 is 5554096056831.

It is an interprime number because it is at equal distance from previous prime (1386506904553) and next prime (1386506904557).

It is not a de Polignac number, because 1386506904555 - 2¹ = 1386506904553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1386506904495 and 1386506904504.

It is not an unprimeable number, because it can be changed into a prime (1386506904553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81902502 + ... + 81919428.

It is an arithmetic number, because the mean of its divisors is an integer number (69477996672).

Almost surely, 2^{1386506904555} is an apocalyptic number.

1386506904555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1386506904555 is a deficient number, since it is larger than the sum of its proper divisors (836788988949).

1386506904555 is a wasteful number, since it uses less digits than its factorization.

1386506904555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28635.

The product of its (nonzero) digits is 19440000, while the sum is 57.

The spelling of 1386506904555 in words is "one trillion, three hundred eighty-six billion, five hundred six million, nine hundred four thousand, five hundred fifty-five".