61299633218856 has 16 divisors (see below), whose sum is σ = 153249083047200. Its totient is φ = 20433211072944.

The previous prime is 61299633218839. The next prime is 61299633218869. The reversal of 61299633218856 is 65881233699216.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277075692036 + ... + 1277075692083.

It is an arithmetic number, because the mean of its divisors is an integer number (9578067690450).

Almost surely, 2^{61299633218856} is an apocalyptic number.

It is an amenable number.

61299633218856 is an abundant number, since it is smaller than the sum of its proper divisors (91949449828344).

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

61299633218856 is a wasteful number, since it uses less digits than its factorization.

61299633218856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554151384128 (or 2554151384124 counting only the distinct ones).

The product of its digits is 201553920, while the sum is 69.

The spelling of 61299633218856 in words is "sixty-one trillion, two hundred ninety-nine billion, six hundred thirty-three million, two hundred eighteen thousand, eight hundred fifty-six".