61293550848 has 72 divisors (see below), whose sum is σ = 163266118848. Its totient is φ = 20414164992.

The previous prime is 61293550819. The next prime is 61293550853. The reversal of 61293550848 is 84805539216.

It is a self number, because there is not a number n which added to its sum of digits gives 61293550848.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 906636 + ... + 971892.

It is an arithmetic number, because the mean of its divisors is an integer number (2267584984).

Almost surely, 2^61293550848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61293550848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81633059424).

61293550848 is an abundant number, since it is smaller than the sum of its proper divisors (101972568000).

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

61293550848 is a wasteful number, since it uses less digits than its factorization.

61293550848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66499 (or 66485 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 61293550848 in words is "sixty-one billion, two hundred ninety-three million, five hundred fifty thousand, eight hundred forty-eight".