61500306750 has 256 divisors, whose sum is σ = 165739392000. Its totient is φ = 15142464000.

The previous prime is 61500306719. The next prime is 61500306781. The reversal of 61500306750 is 5760300516.

It is an interprime number because it is at equal distance from previous prime (61500306719) and next prime (61500306781).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 120825496 + ... + 120826004.

It is an arithmetic number, because the mean of its divisors is an integer number (647419500).

Almost surely, 2^61500306750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61500306750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82869696000).

61500306750 is an abundant number, since it is smaller than the sum of its proper divisors (104239085250).

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

61500306750 is a wasteful number, since it uses less digits than its factorization.

61500306750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The spelling of 61500306750 in words is "sixty-one billion, five hundred million, three hundred six thousand, seven hundred fifty".