151516668197 has 4 divisors (see below), whose sum is σ = 151517464320. Its totient is φ = 151515872076.

The previous prime is 151516668119. The next prime is 151516668239. The reversal of 151516668197 is 791866615151.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 151516668197 - 2²⁰ = 151515619621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151516664197) 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, 74108 + ... + 555450.

It is an arithmetic number, because the mean of its divisors is an integer number (37879366080).

Almost surely, 2^151516668197 is an apocalyptic number.

It is an amenable number.

151516668197 is a deficient number, since it is larger than the sum of its proper divisors (796123).

151516668197 is an equidigital number, since it uses as much as digits as its factorization.

151516668197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796122.

The product of its digits is 2721600, while the sum is 56.

The spelling of 151516668197 in words is "one hundred fifty-one billion, five hundred sixteen million, six hundred sixty-eight thousand, one hundred ninety-seven".