61678800921042 has 48 divisors (see below), whose sum is σ = 137789105639328. Its totient is φ = 19928176369920.

The previous prime is 61678800920983. The next prime is 61678800921061. The reversal of 61678800921042 is 24012900887616.

It is a happy number.

61678800921042 is a `hidden beast` number, since 616 + 7 + 8 + 8 + 0 + 0 + 9 + 2 + 10 + 4 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 61678800921042.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304052703 + ... + 304255490.

It is an arithmetic number, because the mean of its divisors is an integer number (2870606367486).

Almost surely, 2^{61678800921042} is an apocalyptic number.

61678800921042 is an abundant number, since it is smaller than the sum of its proper divisors (76110304718286).

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

61678800921042 is a wasteful number, since it uses less digits than its factorization.

61678800921042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608308375 (or 608308372 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 61678800921042 in words is "sixty-one trillion, six hundred seventy-eight billion, eight hundred million, nine hundred twenty-one thousand, forty-two".