61604528887 has 8 divisors (see below), whose sum is σ = 67395327120. Its totient is φ = 55845461760.

The previous prime is 61604528873. The next prime is 61604528893. The reversal of 61604528887 is 78882540616.

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

It is not a de Polignac number, because 61604528887 - 2⁷ = 61604528759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61604528827) 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, 7928712 + ... + 7936477.

It is an arithmetic number, because the mean of its divisors is an integer number (8424415890).

Almost surely, 2^61604528887 is an apocalyptic number.

61604528887 is a deficient number, since it is larger than the sum of its proper divisors (5790798233).

61604528887 is a wasteful number, since it uses less digits than its factorization.

61604528887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15865553.

The product of its (nonzero) digits is 5160960, while the sum is 55.

The spelling of 61604528887 in words is "sixty-one billion, six hundred four million, five hundred twenty-eight thousand, eight hundred eighty-seven".