151720166551 has 4 divisors (see below), whose sum is σ = 156614365504. Its totient is φ = 146825967600.

The previous prime is 151720166539. The next prime is 151720166593. The reversal of 151720166551 is 155661027151.

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

It is a cyclic number.

It is not a de Polignac number, because 151720166551 - 2¹⁵ = 151720133783 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 (151720164551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2447099430 + ... + 2447099491.

It is an arithmetic number, because the mean of its divisors is an integer number (39153591376).

Almost surely, 2^151720166551 is an apocalyptic number.

151720166551 is a deficient number, since it is larger than the sum of its proper divisors (4894198953).

151720166551 is an equidigital number, since it uses as much as digits as its factorization.

151720166551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4894198952.

The product of its (nonzero) digits is 63000, while the sum is 40.

The spelling of 151720166551 in words is "one hundred fifty-one billion, seven hundred twenty million, one hundred sixty-six thousand, five hundred fifty-one".