61336534820 has 48 divisors (see below), whose sum is σ = 148782106368. Its totient is φ = 20992181760.

The previous prime is 61336534783. The next prime is 61336534841. The reversal of 61336534820 is 2843563316.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8196332 + ... + 8203811.

It is an arithmetic number, because the mean of its divisors is an integer number (3099627216).

Almost surely, 2^61336534820 is an apocalyptic number.

It is an amenable number.

61336534820 is an abundant number, since it is smaller than the sum of its proper divisors (87445571548).

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

61336534820 is a wasteful number, since it uses less digits than its factorization.

61336534820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16400180 (or 16400178 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 61336534820 in words is "sixty-one billion, three hundred thirty-six million, five hundred thirty-four thousand, eight hundred twenty".