61165651000 has 128 divisors (see below), whose sum is σ = 146707292160. Its totient is φ = 23856336000.

The previous prime is 61165650983. The next prime is 61165651003. The reversal of 61165651000 is 15656116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61165651003) 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 31 ways as a sum of consecutive naturals, for example, 41580265 + ... + 41581735.

It is an arithmetic number, because the mean of its divisors is an integer number (1146150720).

Almost surely, 2^61165651000 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 61165651000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73353646080).

61165651000 is an abundant number, since it is smaller than the sum of its proper divisors (85541641160).

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

61165651000 is a wasteful number, since it uses less digits than its factorization.

61165651000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502 (or 2488 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 61165651000 in words is "sixty-one billion, one hundred sixty-five million, six hundred fifty-one thousand".