61351861 has 8 divisors (see below), whose sum is σ = 65159640. Its totient is φ = 57566208.

The previous prime is 61351859. The next prime is 61351877. The reversal of 61351861 is 16815316.

61351861 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in 4 ways, for example, as 26471025 + 34880836 = 5145^2 + 5906^2 .

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 61351861 - 2¹ = 61351859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61351891) 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, 375 + ... + 11083.

It is an arithmetic number, because the mean of its divisors is an integer number (8144955).

Almost surely, 2^61351861 is an apocalyptic number.

It is an amenable number.

61351861 is a deficient number, since it is larger than the sum of its proper divisors (3807779).

61351861 is a wasteful number, since it uses less digits than its factorization.

61351861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11063.

The product of its digits is 4320, while the sum is 31.

The square root of 61351861 is about 7832.7428784558. The cubic root of 61351861 is about 394.4051528202.

The spelling of 61351861 in words is "sixty-one million, three hundred fifty-one thousand, eight hundred sixty-one".