61501641 has 8 divisors (see below), whose sum is σ = 82053504. Its totient is φ = 40975440.

The previous prime is 61501639. The next prime is 61501667. The reversal of 61501641 is 14610516.

61501641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 61501641 - 2¹ = 61501639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61503641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135 + ... + 11091.

It is an arithmetic number, because the mean of its divisors is an integer number (10256688).

Almost surely, 2^61501641 is an apocalyptic number.

It is an amenable number.

61501641 is a deficient number, since it is larger than the sum of its proper divisors (20551863).

61501641 is a wasteful number, since it uses less digits than its factorization.

61501641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12831.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 61501641 is about 7842.2981963197. The cubic root of 61501641 is about 394.7258493996.

The spelling of 61501641 in words is "sixty-one million, five hundred one thousand, six hundred forty-one".