151645665561 has 64 divisors (see below), whose sum is σ = 239630254080. Its totient is φ = 84403503360.

The previous prime is 151645665559. The next prime is 151645665571. The reversal of 151645665561 is 165566546151.

It is a happy number.

It is not a de Polignac number, because 151645665561 - 2¹ = 151645665559 is a prime.

It is a super-2 number, since 2×151645665561² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (151645665511) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9212040 + ... + 9228486.

It is an arithmetic number, because the mean of its divisors is an integer number (3744222720).

Almost surely, 2^151645665561 is an apocalyptic number.

It is an amenable number.

151645665561 is a deficient number, since it is larger than the sum of its proper divisors (87984588519).

151645665561 is a wasteful number, since it uses less digits than its factorization.

151645665561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17046.

The product of its digits is 3240000, while the sum is 51.

The spelling of 151645665561 in words is "one hundred fifty-one billion, six hundred forty-five million, six hundred sixty-five thousand, five hundred sixty-one".