61959570 has 64 divisors (see below), whose sum is σ = 158837760. Its totient is φ = 15422400.

The previous prime is 61959563. The next prime is 61959581. The reversal of 61959570 is 7595916.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39705 + ... + 41235.

It is an arithmetic number, because the mean of its divisors is an integer number (2481840).

Almost surely, 2^61959570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61959570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79418880).

61959570 is an abundant number, since it is smaller than the sum of its proper divisors (96878190).

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

61959570 is a wasteful number, since it uses less digits than its factorization.

61959570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631.

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 61959570 is about 7871.4401477747. The cubic root of 61959570 is about 395.7031113161.

The spelling of 61959570 in words is "sixty-one million, nine hundred fifty-nine thousand, five hundred seventy".