61614231487578 has 320 divisors, whose sum is σ = 177831451607040. Its totient is φ = 15474350419200.

The previous prime is 61614231487499. The next prime is 61614231487619. The reversal of 61614231487578 is 87578413241616.

61614231487578 is a `hidden beast` number, since 6 + 1 + 6 + 1 + 42 + 3 + 14 + 8 + 7 + 578 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 159 ways as a sum of consecutive naturals, for example, 461259163 + ... + 461392721.

It is an arithmetic number, because the mean of its divisors is an integer number (555723286272).

Almost surely, 2^{61614231487578} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61614231487578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88915725803520).

61614231487578 is an abundant number, since it is smaller than the sum of its proper divisors (116217220119462).

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

61614231487578 is a wasteful number, since it uses less digits than its factorization.

61614231487578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134815 (or 134806 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 63.

The spelling of 61614231487578 in words is "sixty-one trillion, six hundred fourteen billion, two hundred thirty-one million, four hundred eighty-seven thousand, five hundred seventy-eight".