100572065509 has 4 divisors (see below), whose sum is σ = 100710404704. Its totient is φ = 100433726316.

The previous prime is 100572065497. The next prime is 100572065557. The reversal of 100572065509 is 905560275001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 905560275001 = 23327 ⋅38820263.

It is a cyclic number.

It is not a de Polignac number, because 100572065509 - 2²¹ = 100569968357 is a prime.

It is a super-2 number, since 2×100572065509² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100572065309) 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, 69168507 + ... + 69169960.

It is an arithmetic number, because the mean of its divisors is an integer number (25177601176).

Almost surely, 2^100572065509 is an apocalyptic number.

It is an amenable number.

100572065509 is a deficient number, since it is larger than the sum of its proper divisors (138339195).

100572065509 is an equidigital number, since it uses as much as digits as its factorization.

100572065509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138339194.

The product of its (nonzero) digits is 94500, while the sum is 40.

The spelling of 100572065509 in words is "one hundred billion, five hundred seventy-two million, sixty-five thousand, five hundred nine".