61510165050 has 96 divisors (see below), whose sum is σ = 154678939200. Its totient is φ = 16174287360.

The previous prime is 61510165049. The next prime is 61510165091. The reversal of 61510165050 is 5056101516.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61510164999 and 61510165017.

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, 5053572 + ... + 5065728.

It is an arithmetic number, because the mean of its divisors is an integer number (1611238950).

Almost surely, 2^61510165050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61510165050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77339469600).

61510165050 is an abundant number, since it is smaller than the sum of its proper divisors (93168774150).

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

61510165050 is a wasteful number, since it uses less digits than its factorization.

61510165050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12640 (or 12635 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

Adding to 61510165050 its reverse (5056101516), we get a palindrome (66566266566).

The spelling of 61510165050 in words is "sixty-one billion, five hundred ten million, one hundred sixty-five thousand, fifty".