1386400277025 has 27 divisors (see below), whose sum is σ = 2483228575321. Its totient is φ = 739404061440.

The previous prime is 1386400276997. The next prime is 1386400277057. The reversal of 1386400277025 is 5207720046831.

The square root of 1386400277025 is 1177455.

It is a perfect power (a square), and thus also a powerful number.

1386400277025 is a `hidden beast` number, since 138 + 6 + 400 + 27 + 70 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 312714705681 + 1073685571344 = 559209^2 + 1036188^2 .

It is not a de Polignac number, because 1386400277025 - 2²⁵ = 1386366722593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 17622577 + ... + 17701073.

Almost surely, 2^{1386400277025} is an apocalyptic number.

1386400277025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1386400277025 is the 1177455-th square number.

1386400277025 is the 588728-th centered octagonal number.

It is an amenable number.

1386400277025 is a deficient number, since it is larger than the sum of its proper divisors (1096828298296).

1386400277025 is an frugal number, since it uses more digits than its factorization.

1386400277025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157010 (or 78505 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 1386400277025 in words is "one trillion, three hundred eighty-six billion, four hundred million, two hundred seventy-seven thousand, twenty-five".