145565515001 has 4 divisors (see below), whose sum is σ = 154128192372. Its totient is φ = 137002837632.

The previous prime is 145565514977. The next prime is 145565515049. The reversal of 145565515001 is 100515565541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100515565541 = 233 ⋅431397277.

It can be written as a sum of positive squares in 2 ways, for example, as 90141055225 + 55424459776 = 300235^2 + 235424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145565515001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145565515301) 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, 4281338660 + ... + 4281338693.

It is an arithmetic number, because the mean of its divisors is an integer number (38532048093).

Almost surely, 2^145565515001 is an apocalyptic number.

It is an amenable number.

145565515001 is a deficient number, since it is larger than the sum of its proper divisors (8562677371).

145565515001 is an equidigital number, since it uses as much as digits as its factorization.

145565515001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8562677370.

The product of its (nonzero) digits is 75000, while the sum is 38.

The spelling of 145565515001 in words is "one hundred forty-five billion, five hundred sixty-five million, five hundred fifteen thousand, one".