145639616 has 14 divisors (see below), whose sum is σ = 289003740. Its totient is φ = 72819776.

The previous prime is 145639609. The next prime is 145639621. The reversal of 145639616 is 616936541.

145639616 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1137746 + ... + 1137873.

Almost surely, 2^145639616 is an apocalyptic number.

145639616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

145639616 is a deficient number, since it is larger than the sum of its proper divisors (143364124).

145639616 is an equidigital number, since it uses as much as digits as its factorization.

145639616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275631 (or 2275621 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 145639616 is about 12068.1239635662. The cubic root of 145639616 is about 526.1301320864.

The spelling of 145639616 in words is "one hundred forty-five million, six hundred thirty-nine thousand, six hundred sixteen".