61858631 has 8 divisors (see below), whose sum is σ = 65590560. Its totient is φ = 58137088.

The previous prime is 61858619. The next prime is 61858673. The reversal of 61858631 is 13685816.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61858631 is a prime.

It is a super-2 number, since 2×61858631² = 7652980458388322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61858231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12095 + ... + 16431.

It is an arithmetic number, because the mean of its divisors is an integer number (8198820).

Almost surely, 2^61858631 is an apocalyptic number.

61858631 is a deficient number, since it is larger than the sum of its proper divisors (3731929).

61858631 is a wasteful number, since it uses less digits than its factorization.

61858631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5193.

The product of its digits is 34560, while the sum is 38.

The square root of 61858631 is about 7865.0258105107. The cubic root of 61858631 is about 395.4881131276.

The spelling of 61858631 in words is "sixty-one million, eight hundred fifty-eight thousand, six hundred thirty-one".