71820201201519 has 4 divisors (see below), whose sum is σ = 95760268268696. Its totient is φ = 47880134134344.

The previous prime is 71820201201503. The next prime is 71820201201523. The reversal of 71820201201519 is 91510210202817.

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

It is not a de Polignac number, because 71820201201519 - 2⁴ = 71820201201503 is a prime.

It is a super-2 number, since 2×71820201201519² (a number of 29 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 (71820201201319) 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, 11970033533584 + ... + 11970033533589.

It is an arithmetic number, because the mean of its divisors is an integer number (23940067067174).

Almost surely, 2^{71820201201519} is an apocalyptic number.

71820201201519 is a deficient number, since it is larger than the sum of its proper divisors (23940067067177).

71820201201519 is a wasteful number, since it uses less digits than its factorization.

71820201201519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23940067067176.

The product of its (nonzero) digits is 20160, while the sum is 39.

The spelling of 71820201201519 in words is "seventy-one trillion, eight hundred twenty billion, two hundred one million, two hundred one thousand, five hundred nineteen".