61523406 has 96 divisors (see below), whose sum is σ = 165734400. Its totient is φ = 16096320.

The previous prime is 61523393. The next prime is 61523419. The reversal of 61523406 is 60432516.

61523406 is a `hidden beast` number, since 615 + 2 + 3 + 40 + 6 = 666.

61523406 is nontrivially palindromic in base 5.

It is an interprime number because it is at equal distance from previous prime (61523393) and next prime (61523419).

It is a zygodrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 61523406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73800 + ... + 74628.

It is an arithmetic number, because the mean of its divisors is an integer number (1726400).

Almost surely, 2^61523406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61523406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82867200).

61523406 is an abundant number, since it is smaller than the sum of its proper divisors (104210994).

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

61523406 is a wasteful number, since it uses less digits than its factorization.

61523406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 61523406 is about 7843.6857407726. The cubic root of 61523406 is about 394.7724074790.

The spelling of 61523406 in words is "sixty-one million, five hundred twenty-three thousand, four hundred six".