61315641 has 12 divisors (see below), whose sum is σ = 93228720. Its totient is φ = 38725560.

The previous prime is 61315633. The next prime is 61315643. The reversal of 61315641 is 14651316.

61315641 is a `hidden beast` number, since 6 + 1 + 3 + 15 + 641 = 666.

It is not a de Polignac number, because 61315641 - 2³ = 61315633 is a prime.

It is a super-3 number, since 3×61315641³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61315643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179115 + ... + 179456.

It is an arithmetic number, because the mean of its divisors is an integer number (7769060).

Almost surely, 2^61315641 is an apocalyptic number.

It is an amenable number.

61315641 is a deficient number, since it is larger than the sum of its proper divisors (31913079).

61315641 is a wasteful number, since it uses less digits than its factorization.

61315641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358596 (or 358593 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 61315641 is about 7830.4304479384. The cubic root of 61315641 is about 394.3275231905.

Adding to 61315641 its reverse (14651316), we get a palindrome (75966957).

The spelling of 61315641 in words is "sixty-one million, three hundred fifteen thousand, six hundred forty-one".