61501611 has 8 divisors (see below), whose sum is σ = 82057360. Its totient is φ = 40973472.

The previous prime is 61501607. The next prime is 61501619. The reversal of 61501611 is 11610516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61501611 - 2² = 61501607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61501619) 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, 976 + ... + 11133.

It is an arithmetic number, because the mean of its divisors is an integer number (10257170).

Almost surely, 2^61501611 is an apocalyptic number.

61501611 is a deficient number, since it is larger than the sum of its proper divisors (20555749).

61501611 is a wasteful number, since it uses less digits than its factorization.

61501611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13805.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 61501611 is about 7842.2962836149. The cubic root of 61501611 is about 394.7257852182.

The spelling of 61501611 in words is "sixty-one million, five hundred one thousand, six hundred eleven".