61501770 has 192 divisors, whose sum is σ = 189506304. Its totient is φ = 13685760.

The previous prime is 61501753. The next prime is 61501789. The reversal of 61501770 is 7710516.

61501770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 842454 + ... + 842526.

It is an arithmetic number, because the mean of its divisors is an integer number (987012).

Almost surely, 2^61501770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61501770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94753152).

61501770 is an abundant number, since it is smaller than the sum of its proper divisors (128004534).

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

61501770 is a wasteful number, since it uses less digits than its factorization.

61501770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 61501770 is about 7842.3064209453. The cubic root of 61501770 is about 394.7261253792.

The spelling of 61501770 in words is "sixty-one million, five hundred one thousand, seven hundred seventy".