61511661550010 has 16 divisors (see below), whose sum is σ = 126538275188736. Its totient is φ = 21089712531408.

The previous prime is 61511661549979. The next prime is 61511661550123. The reversal of 61511661550010 is 1005516611516.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439369011002 + ... + 439369011141.

It is an arithmetic number, because the mean of its divisors is an integer number (7908642199296).

Almost surely, 2^{61511661550010} is an apocalyptic number.

61511661550010 is an abundant number, since it is smaller than the sum of its proper divisors (65026613638726).

61511661550010 is a wasteful number, since it uses less digits than its factorization.

61511661550010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878738022157.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 61511661550010 in words is "sixty-one trillion, five hundred eleven billion, six hundred sixty-one million, five hundred fifty thousand, ten".