151565672721 has 8 divisors (see below), whose sum is σ = 207549389824. Its totient is φ = 98312868720.

The previous prime is 151565672717. The next prime is 151565672779. The reversal of 151565672721 is 127276565151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 151565672721 - 2² = 151565672717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151565670721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682728145 + ... + 682728366.

It is an arithmetic number, because the mean of its divisors is an integer number (25943673728).

Almost surely, 2^151565672721 is an apocalyptic number.

It is an amenable number.

151565672721 is a deficient number, since it is larger than the sum of its proper divisors (55983717103).

151565672721 is a wasteful number, since it uses less digits than its factorization.

151565672721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365456551.

The product of its digits is 882000, while the sum is 48.

The spelling of 151565672721 in words is "one hundred fifty-one billion, five hundred sixty-five million, six hundred seventy-two thousand, seven hundred twenty-one".