61969470 has 64 divisors (see below), whose sum is σ = 152893440. Its totient is φ = 16069248.

The previous prime is 61969451. The next prime is 61969477. The reversal of 61969470 is 7496916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61969477) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277779 + ... + 278001.

It is an arithmetic number, because the mean of its divisors is an integer number (2388960).

Almost surely, 2^61969470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61969470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76446720).

61969470 is an abundant number, since it is smaller than the sum of its proper divisors (90923970).

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

61969470 is a wasteful number, since it uses less digits than its factorization.

61969470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 61969470 is about 7872.0689783563. The cubic root of 61969470 is about 395.7241855541.

The spelling of 61969470 in words is "sixty-one million, nine hundred sixty-nine thousand, four hundred seventy".