61621170 has 32 divisors (see below), whose sum is σ = 159268032. Its totient is φ = 15168192.

The previous prime is 61621159. The next prime is 61621171. The reversal of 61621170 is 7112616.

61621170 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61621170.

It is not an unprimeable number, because it can be changed into a prime (61621171) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 78612 + ... + 79391.

It is an arithmetic number, because the mean of its divisors is an integer number (4977126).

Almost surely, 2^61621170 is an apocalyptic number.

61621170 is an abundant number, since it is smaller than the sum of its proper divisors (97646862).

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

61621170 is a wasteful number, since it uses less digits than its factorization.

61621170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158026.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 61621170 is about 7849.9152861671. The cubic root of 61621170 is about 394.9814016773.

Adding to 61621170 its reverse (7112616), we get a palindrome (68733786).

The spelling of 61621170 in words is "sixty-one million, six hundred twenty-one thousand, one hundred seventy".