61571013650 has 24 divisors (see below), whose sum is σ = 117617280420. Its totient is φ = 23962772160.

The previous prime is 61571013611. The next prime is 61571013653. The reversal of 61571013650 is 5631017516.

61571013650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 53235871441 + 8335142209 = 230729^2 + 91297^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61571013650.

It is not an unprimeable number, because it can be changed into a prime (61571013653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16638965 + ... + 16642664.

Almost surely, 2^61571013650 is an apocalyptic number.

61571013650 is a deficient number, since it is larger than the sum of its proper divisors (56046266770).

61571013650 is a wasteful number, since it uses less digits than its factorization.

61571013650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33281678 (or 33281673 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 35.

The spelling of 61571013650 in words is "sixty-one billion, five hundred seventy-one million, thirteen thousand, six hundred fifty".