61656427010140 has 48 divisors (see below), whose sum is σ = 131253470312832. Its totient is φ = 24324487266816.

The previous prime is 61656427010107. The next prime is 61656427010197. The reversal of 61656427010140 is 4101072465616.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253403022 + ... + 253646218.

It is an arithmetic number, because the mean of its divisors is an integer number (2734447298184).

Almost surely, 2^{61656427010140} is an apocalyptic number.

It is an amenable number.

61656427010140 is an abundant number, since it is smaller than the sum of its proper divisors (69597043302692).

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

61656427010140 is a wasteful number, since it uses less digits than its factorization.

61656427010140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416926 (or 416924 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

Adding to 61656427010140 its reverse (4101072465616), we get a palindrome (65757499475756).

The spelling of 61656427010140 in words is "sixty-one trillion, six hundred fifty-six billion, four hundred twenty-seven million, ten thousand, one hundred forty".