616400265 has 32 divisors (see below), whose sum is σ = 1075576320. Its totient is φ = 299609856.

The previous prime is 616400243. The next prime is 616400269. The reversal of 616400265 is 562004616.

It is not a de Polignac number, because 616400265 - 2⁸ = 616400009 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (616400269) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4602 + ... + 35411.

It is an arithmetic number, because the mean of its divisors is an integer number (33611760).

Almost surely, 2^616400265 is an apocalyptic number.

616400265 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

616400265 is a deficient number, since it is larger than the sum of its proper divisors (459176055).

616400265 is a wasteful number, since it uses less digits than its factorization.

616400265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40113.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 616400265 is about 24827.4095507365. The cubic root of 616400265 is about 851.0484248679.

The spelling of 616400265 in words is "six hundred sixteen million, four hundred thousand, two hundred sixty-five".