61740851 has 4 divisors (see below), whose sum is σ = 61813752. Its totient is φ = 61667952.

The previous prime is 61740841. The next prime is 61740853. The reversal of 61740851 is 15804716.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61740851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61740853) 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, 35165 + ... + 36878.

It is an arithmetic number, because the mean of its divisors is an integer number (15453438).

Almost surely, 2^61740851 is an apocalyptic number.

61740851 is a deficient number, since it is larger than the sum of its proper divisors (72901).

61740851 is an equidigital number, since it uses as much as digits as its factorization.

61740851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72900.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 61740851 is about 7857.5346642570. The cubic root of 61740851 is about 395.2369480438.

The spelling of 61740851 in words is "sixty-one million, seven hundred forty thousand, eight hundred fifty-one".