61604641 has 8 divisors (see below), whose sum is σ = 71397504. Its totient is φ = 52059840.

The previous prime is 61604633. The next prime is 61604659. The reversal of 61604641 is 14640616.

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

It is not a de Polignac number, because 61604641 - 2³ = 61604633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61604341) 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, 61480 + ... + 62473.

It is an arithmetic number, because the mean of its divisors is an integer number (8924688).

Almost surely, 2^61604641 is an apocalyptic number.

It is an amenable number.

61604641 is a deficient number, since it is larger than the sum of its proper divisors (9792863).

61604641 is a wasteful number, since it uses less digits than its factorization.

61604641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124031.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 61604641 is about 7848.8624016478. The cubic root of 61604641 is about 394.9460824766.

It can be divided in two parts, 6160 and 4641, that added together give a palindrome (10801).

The spelling of 61604641 in words is "sixty-one million, six hundred four thousand, six hundred forty-one".