61315869 has 16 divisors (see below), whose sum is σ = 88159680. Its totient is φ = 37779840.

The previous prime is 61315867. The next prime is 61315897. The reversal of 61315869 is 96851316.

It is not a de Polignac number, because 61315869 - 2¹ = 61315867 is a prime.

It is a super-2 number, since 2×61315869² = 7519271582450322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61315867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10782 + ... + 15455.

It is an arithmetic number, because the mean of its divisors is an integer number (5509980).

Almost surely, 2^61315869 is an apocalyptic number.

It is an amenable number.

61315869 is a deficient number, since it is larger than the sum of its proper divisors (26843811).

61315869 is a wasteful number, since it uses less digits than its factorization.

61315869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26300.

The product of its digits is 38880, while the sum is 39.

The square root of 61315869 is about 7830.4450065114. The cubic root of 61315869 is about 394.3280119542.

The spelling of 61315869 in words is "sixty-one million, three hundred fifteen thousand, eight hundred sixty-nine".