61699505168 has 40 divisors (see below), whose sum is σ = 136692447552. Its totient is φ = 26428687488.

The previous prime is 61699505143. The next prime is 61699505243. The reversal of 61699505168 is 86150599616.

It is a happy number.

61699505168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69146 + ... + 358022.

Almost surely, 2^61699505168 is an apocalyptic number.

It is an amenable number.

61699505168 is an abundant number, since it is smaller than the sum of its proper divisors (74992942384).

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

61699505168 is a wasteful number, since it uses less digits than its factorization.

61699505168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290799 (or 290793 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 56.

The spelling of 61699505168 in words is "sixty-one billion, six hundred ninety-nine million, five hundred five thousand, one hundred sixty-eight".