615016961 has 8 divisors (see below), whose sum is σ = 662616360. Its totient is φ = 567459072.

The previous prime is 615016943. The next prime is 615017047. The reversal of 615016961 is 169610516.

It can be written as a sum of positive squares in 4 ways, for example, as 12559936 + 602457025 = 3544^2 + 24545^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 615016961 - 2²² = 610822657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (615016561) 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, 24851 + ... + 42983.

It is an arithmetic number, because the mean of its divisors is an integer number (82827045).

Almost surely, 2^615016961 is an apocalyptic number.

It is an amenable number.

615016961 is a deficient number, since it is larger than the sum of its proper divisors (47599399).

615016961 is a wasteful number, since it uses less digits than its factorization.

615016961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20755.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 615016961 is about 24799.5354996822. The cubic root of 615016961 is about 850.4113169630.

The spelling of 615016961 in words is "six hundred fifteen million, sixteen thousand, nine hundred sixty-one".