61003349550 has 288 divisors, whose sum is σ = 193122951840. Its totient is φ = 13610419200.

The previous prime is 61003349531. The next prime is 61003349569. The reversal of 61003349550 is 5594330016.

61003349550 is a `hidden beast` number, since 61 + 0 + 0 + 3 + 3 + 49 + 550 = 666.

61003349550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61003349531) and next prime (61003349569).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 25030932 + ... + 25033368.

It is an arithmetic number, because the mean of its divisors is an integer number (670565805).

Almost surely, 2^61003349550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61003349550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96561475920).

61003349550 is an abundant number, since it is smaller than the sum of its proper divisors (132119602290).

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

61003349550 is a wasteful number, since it uses less digits than its factorization.

61003349550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868 (or 2860 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

Adding to 61003349550 its reverse (5594330016), we get a palindrome (66597679566).

The spelling of 61003349550 in words is "sixty-one billion, three million, three hundred forty-nine thousand, five hundred fifty".