61501716 has 36 divisors (see below), whose sum is σ = 164609172. Its totient is φ = 19294464.

The previous prime is 61501669. The next prime is 61501717. The reversal of 61501716 is 61710516.

It can be written as a sum of positive squares in 2 ways, for example, as 57699216 + 3802500 = 7596^2 + 1950^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×61501716² = 7564922141889312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61501716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61501717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49635 + ... + 50858.

It is an arithmetic number, because the mean of its divisors is an integer number (4572477).

Almost surely, 2^61501716 is an apocalyptic number.

It is an amenable number.

61501716 is an abundant number, since it is smaller than the sum of its proper divisors (103107456).

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

61501716 is a wasteful number, since it uses less digits than its factorization.

61501716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100520 (or 100515 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 61501716 is about 7842.3029780798. The cubic root of 61501716 is about 394.7260098529.

The spelling of 61501716 in words is "sixty-one million, five hundred one thousand, seven hundred sixteen".