1381999952015 has 4 divisors (see below), whose sum is σ = 1658399942424. Its totient is φ = 1105599961608.

The previous prime is 1381999951993. The next prime is 1381999952027. The reversal of 1381999952015 is 5102599991831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1381999952015 - 2⁶ = 1381999951951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138199995197 + ... + 138199995206.

It is an arithmetic number, because the mean of its divisors is an integer number (414599985606).

Almost surely, 2^{1381999952015} is an apocalyptic number.

1381999952015 is a deficient number, since it is larger than the sum of its proper divisors (276399990409).

1381999952015 is an equidigital number, since it uses as much as digits as its factorization.

1381999952015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276399990408.

The product of its (nonzero) digits is 7873200, while the sum is 62.

The spelling of 1381999952015 in words is "one trillion, three hundred eighty-one billion, nine hundred ninety-nine million, nine hundred fifty-two thousand, fifteen".