61819958088 has 192 divisors, whose sum is σ = 192897394560. Its totient is φ = 17520427008.

The previous prime is 61819958063. The next prime is 61819958183. The reversal of 61819958088 is 88085991816.

61819958088 is a `hidden beast` number, since 618 + 1 + 9 + 9 + 5 + 8 + 0 + 8 + 8 = 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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35878395 + ... + 35880117.

It is an arithmetic number, because the mean of its divisors is an integer number (1004673930).

Almost surely, 2^61819958088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61819958088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96448697280).

61819958088 is an abundant number, since it is smaller than the sum of its proper divisors (131077436472).

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

61819958088 is a wasteful number, since it uses less digits than its factorization.

61819958088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276 (or 2269 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 63.

The spelling of 61819958088 in words is "sixty-one billion, eight hundred nineteen million, nine hundred fifty-eight thousand, eighty-eight".