616263261 has 8 divisors (see below), whose sum is σ = 821830944. Its totient is φ = 410768880.

The previous prime is 616263247. The next prime is 616263283. The reversal of 616263261 is 162362616.

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

It is not a de Polignac number, because 616263261 - 2⁷ = 616263133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616263211) 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, 5851 + ... + 35591.

It is an arithmetic number, because the mean of its divisors is an integer number (102728868).

Almost surely, 2^616263261 is an apocalyptic number.

It is an amenable number.

616263261 is a deficient number, since it is larger than the sum of its proper divisors (205567683).

616263261 is a wasteful number, since it uses less digits than its factorization.

616263261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36651.

The product of its digits is 15552, while the sum is 33.

The square root of 616263261 is about 24824.6502694398. The cubic root of 616263261 is about 850.9853675307.

The spelling of 616263261 in words is "six hundred sixteen million, two hundred sixty-three thousand, two hundred sixty-one".