61401606 has 36 divisors (see below), whose sum is σ = 143165988. Its totient is φ = 17504928.

The previous prime is 61401589. The next prime is 61401623. The reversal of 61401606 is 60610416.

It is an interprime number because it is at equal distance from previous prime (61401589) and next prime (61401623).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 134130 + ... + 134586.

It is an arithmetic number, because the mean of its divisors is an integer number (3976833).

Almost surely, 2^61401606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61401606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71582994).

61401606 is an abundant number, since it is smaller than the sum of its proper divisors (81764382).

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

61401606 is an equidigital number, since it uses as much as digits as its factorization.

61401606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 61401606 is about 7835.9176871634. The cubic root of 61401606 is about 394.5117205415.

Multiplying 61401606 by its sum of digits (24), we get a square (1473638544 = 38388²).

Multiplying 61401606 by its product of nonzero digits (864), we get a square (53050987584 = 230328²).

The spelling of 61401606 in words is "sixty-one million, four hundred one thousand, six hundred six".