61801601 has 8 divisors (see below), whose sum is σ = 62984064. Its totient is φ = 60624720.

The previous prime is 61801591. The next prime is 61801627. The reversal of 61801601 is 10610816.

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-61801601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61801651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25880 + ... + 28166.

It is an arithmetic number, because the mean of its divisors is an integer number (7873008).

Almost surely, 2^61801601 is an apocalyptic number.

61801601 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

61801601 is a deficient number, since it is larger than the sum of its proper divisors (1182463).

61801601 is a wasteful number, since it uses less digits than its factorization.

61801601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2791.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 61801601 is about 7861.3994301269. The cubic root of 61801601 is about 395.3665368731.

The spelling of 61801601 in words is "sixty-one million, eight hundred one thousand, six hundred one".