145615750721 has 8 divisors (see below), whose sum is σ = 166530229824. Its totient is φ = 124729328880.

The previous prime is 145615750699. The next prime is 145615750723. The reversal of 145615750721 is 127057516541.

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

It is a cyclic number.

It is not a de Polignac number, because 145615750721 - 2²² = 145611556417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145615750723) 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, 7003190 + ... + 7023951.

It is an arithmetic number, because the mean of its divisors is an integer number (20816278728).

Almost surely, 2^145615750721 is an apocalyptic number.

It is an amenable number.

145615750721 is a deficient number, since it is larger than the sum of its proper divisors (20914479103).

145615750721 is a wasteful number, since it uses less digits than its factorization.

145615750721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14028631.

The product of its (nonzero) digits is 294000, while the sum is 44.

The spelling of 145615750721 in words is "one hundred forty-five billion, six hundred fifteen million, seven hundred fifty thousand, seven hundred twenty-one".