61310553642 has 32 divisors (see below), whose sum is σ = 146726112960. Its totient is φ = 18864785520.

The previous prime is 61310553641. The next prime is 61310553679. The reversal of 61310553642 is 24635501316.

61310553642 is a `hidden beast` number, since 6 + 1 + 3 + 1 + 0 + 5 + 5 + 3 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 61310553597 and 61310553606.

It is not an unprimeable number, because it can be changed into a prime (61310553641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 43667784 + ... + 43669187.

It is an arithmetic number, because the mean of its divisors is an integer number (4585191030).

Almost surely, 2^61310553642 is an apocalyptic number.

61310553642 is an abundant number, since it is smaller than the sum of its proper divisors (85415559318).

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

61310553642 is a wasteful number, since it uses less digits than its factorization.

61310553642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87336995 (or 87336989 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 61310553642 in words is "sixty-one billion, three hundred ten million, five hundred fifty-three thousand, six hundred forty-two".