617278945 has 16 divisors (see below), whose sum is σ = 786049920. Its totient is φ = 464341504.

The previous prime is 617278939. The next prime is 617278951. The reversal of 617278945 is 549872716.

It is an interprime number because it is at equal distance from previous prime (617278939) and next prime (617278951).

It is a cyclic number.

It is not a de Polignac number, because 617278945 - 2²¹ = 615181793 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38704 + ... + 52273.

It is an arithmetic number, because the mean of its divisors is an integer number (49128120).

Almost surely, 2^617278945 is an apocalyptic number.

It is an amenable number.

617278945 is a deficient number, since it is larger than the sum of its proper divisors (168770975).

617278945 is a wasteful number, since it uses less digits than its factorization.

617278945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91064.

The product of its digits is 846720, while the sum is 49.

The square root of 617278945 is about 24845.0990136888. The cubic root of 617278945 is about 851.4526233645.

The spelling of 617278945 in words is "six hundred seventeen million, two hundred seventy-eight thousand, nine hundred forty-five".