145721476099 has 4 divisors (see below), whose sum is σ = 146141423064. Its totient is φ = 145301529136.

The previous prime is 145721476081. The next prime is 145721476141. The reversal of 145721476099 is 990674127541.

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 145721476099 - 2⁵ = 145721476067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145721476009) 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, 209972962 + ... + 209973655.

It is an arithmetic number, because the mean of its divisors is an integer number (36535355766).

Almost surely, 2^145721476099 is an apocalyptic number.

145721476099 is a deficient number, since it is larger than the sum of its proper divisors (419946965).

145721476099 is an equidigital number, since it uses as much as digits as its factorization.

145721476099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419946964.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 145721476099 in words is "one hundred forty-five billion, seven hundred twenty-one million, four hundred seventy-six thousand, ninety-nine".