61656151 has 8 divisors (see below), whose sum is σ = 63256320. Its totient is φ = 60068088.

The previous prime is 61656149. The next prime is 61656163. The reversal of 61656151 is 15165616.

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 61656151 - 2¹ = 61656149 is a prime.

It is a super-2 number, since 2×61656151² = 7602961912269602, 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 (61656131) 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, 7780 + ... + 13558.

It is an arithmetic number, because the mean of its divisors is an integer number (7907040).

Almost surely, 2^61656151 is an apocalyptic number.

61656151 is a deficient number, since it is larger than the sum of its proper divisors (1600169).

61656151 is a wasteful number, since it uses less digits than its factorization.

61656151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6053.

The product of its digits is 5400, while the sum is 31.

The square root of 61656151 is about 7852.1430832608. The cubic root of 61656151 is about 395.0561283269.

It can be divided in two parts, 6165615 and 1, that added together give a palindrome (6165616).

The spelling of 61656151 in words is "sixty-one million, six hundred fifty-six thousand, one hundred fifty-one".