135625512019 has 4 divisors (see below), whose sum is σ = 135748473696. Its totient is φ = 135502550344.

The previous prime is 135625512013. The next prime is 135625512031. The reversal of 135625512019 is 910215526531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910215526531 = 75479 ⋅12059189.

It is a cyclic number.

It is not a de Polignac number, because 135625512019 - 2²⁷ = 135491294291 is a prime.

It is a super-2 number, since 2×135625512019² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135625512013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61479184 + ... + 61481389.

It is an arithmetic number, because the mean of its divisors is an integer number (33937118424).

Almost surely, 2^135625512019 is an apocalyptic number.

135625512019 is a deficient number, since it is larger than the sum of its proper divisors (122961677).

135625512019 is a wasteful number, since it uses less digits than its factorization.

135625512019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122961676.

The product of its (nonzero) digits is 81000, while the sum is 40.

The spelling of 135625512019 in words is "one hundred thirty-five billion, six hundred twenty-five million, five hundred twelve thousand, nineteen".