61305542612 has 24 divisors (see below), whose sum is σ = 111032971560. Its totient is φ = 29582766080.

The previous prime is 61305542567. The next prime is 61305542651. The reversal of 61305542612 is 21624550316.

It can be written as a sum of positive squares in 4 ways, for example, as 8145784516 + 53159758096 = 90254^2 + 230564^2 .

It is a super-4 number, since 4×61305542612⁴ (a number of 44 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151412 + ... + 381492.

It is an arithmetic number, because the mean of its divisors is an integer number (4626373815).

Almost surely, 2^61305542612 is an apocalyptic number.

It is an amenable number.

61305542612 is a deficient number, since it is larger than the sum of its proper divisors (49727428948).

61305542612 is a wasteful number, since it uses less digits than its factorization.

61305542612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232411 (or 232409 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 61305542612 in words is "sixty-one billion, three hundred five million, five hundred forty-two thousand, six hundred twelve".