145622556647 has 4 divisors (see below), whose sum is σ = 148009811736. Its totient is φ = 143235301560.

The previous prime is 145622556641. The next prime is 145622556679. The reversal of 145622556647 is 746655226541.

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 145622556647 - 2²⁶ = 145555447783 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 (145622556641) 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, 1193627453 + ... + 1193627574.

It is an arithmetic number, because the mean of its divisors is an integer number (37002452934).

Almost surely, 2^145622556647 is an apocalyptic number.

145622556647 is a deficient number, since it is larger than the sum of its proper divisors (2387255089).

145622556647 is an equidigital number, since it uses as much as digits as its factorization.

145622556647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2387255088.

The product of its digits is 12096000, while the sum is 53.

The spelling of 145622556647 in words is "one hundred forty-five billion, six hundred twenty-two million, five hundred fifty-six thousand, six hundred forty-seven".