1387640125023 has 16 divisors (see below), whose sum is σ = 1876428239616. Its totient is φ = 911975247680.

The previous prime is 1387640124971. The next prime is 1387640125033. The reversal of 1387640125023 is 3205210467831.

It is a cyclic number.

It is not a de Polignac number, because 1387640125023 - 2¹³ = 1387640116831 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387640125033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1915840 + ... + 2538842.

It is an arithmetic number, because the mean of its divisors is an integer number (117276764976).

Almost surely, 2^{1387640125023} is an apocalyptic number.

1387640125023 is a deficient number, since it is larger than the sum of its proper divisors (488788114593).

1387640125023 is a wasteful number, since it uses less digits than its factorization.

1387640125023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633534.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 1387640125023 in words is "one trillion, three hundred eighty-seven billion, six hundred forty million, one hundred twenty-five thousand, twenty-three".