616623945 has 32 divisors (see below), whose sum is σ = 1163919360. Its totient is φ = 272790720.

The previous prime is 616623923. The next prime is 616623961. The reversal of 616623945 is 549326616.

It is not a de Polignac number, because 616623945 - 2¹⁰ = 616622921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 616623897 and 616623906.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91465 + ... + 97974.

It is an arithmetic number, because the mean of its divisors is an integer number (36372480).

Almost surely, 2^616623945 is an apocalyptic number.

It is an amenable number.

616623945 is a deficient number, since it is larger than the sum of its proper divisors (547295415).

616623945 is a wasteful number, since it uses less digits than its factorization.

616623945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189485.

The product of its digits is 233280, while the sum is 42.

The square root of 616623945 is about 24831.9138408621. The cubic root of 616623945 is about 851.1513555450.

The spelling of 616623945 in words is "six hundred sixteen million, six hundred twenty-three thousand, nine hundred forty-five".