1538217500973 has 8 divisors (see below), whose sum is σ = 2051072815200. Its totient is φ = 1025420260368.

The previous prime is 1538217500933. The next prime is 1538217501011. The reversal of 1538217500973 is 3790057128351.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1538217500973 - 2¹³ = 1538217492781 is a prime.

It is a super-2 number, since 2×1538217500973² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538217500933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14456563 + ... + 14562576.

It is an arithmetic number, because the mean of its divisors is an integer number (256384101900).

Almost surely, 2^{1538217500973} is an apocalyptic number.

It is an amenable number.

1538217500973 is a deficient number, since it is larger than the sum of its proper divisors (512855314227).

1538217500973 is a wasteful number, since it uses less digits than its factorization.

1538217500973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29036811.

The product of its (nonzero) digits is 1587600, while the sum is 51.

It can be divided in two parts, 1538217 and 500973, that added together give a triangular number (2039190 = T₂₀₁₉).

The spelling of 1538217500973 in words is "one trillion, five hundred thirty-eight billion, two hundred seventeen million, five hundred thousand, nine hundred seventy-three".