61361851 has 4 divisors (see below), whose sum is σ = 62051400. Its totient is φ = 60672304.

The previous prime is 61361831. The next prime is 61361869. The reversal of 61361851 is 15816316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61361851 - 2¹¹ = 61359803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61361801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344641 + ... + 344818.

It is an arithmetic number, because the mean of its divisors is an integer number (15512850).

Almost surely, 2^61361851 is an apocalyptic number.

61361851 is a deficient number, since it is larger than the sum of its proper divisors (689549).

61361851 is an equidigital number, since it uses as much as digits as its factorization.

61361851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689548.

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

The square root of 61361851 is about 7833.3805601413. The cubic root of 61361851 is about 394.4265588193.

The spelling of 61361851 in words is "sixty-one million, three hundred sixty-one thousand, eight hundred fifty-one".