61129628336 has 80 divisors (see below), whose sum is σ = 136133786880. Its totient is φ = 26048736000.

The previous prime is 61129628333. The next prime is 61129628353. The reversal of 61129628336 is 63382692116.

61129628336 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61129628333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19929875 + ... + 19932941.

It is an arithmetic number, because the mean of its divisors is an integer number (1701672336).

Almost surely, 2^61129628336 is an apocalyptic number.

It is an amenable number.

61129628336 is an abundant number, since it is smaller than the sum of its proper divisors (75004158544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61129628336 is a wasteful number, since it uses less digits than its factorization.

61129628336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042 (or 4036 counting only the distinct ones).

The product of its digits is 559872, while the sum is 47.

The spelling of 61129628336 in words is "sixty-one billion, one hundred twenty-nine million, six hundred twenty-eight thousand, three hundred thirty-six".