61015626 has 128 divisors (see below), whose sum is σ = 165150720. Its totient is φ = 16329600.

The previous prime is 61015613. The next prime is 61015637. The reversal of 61015626 is 62651016.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 61015626.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 480375 + ... + 480501.

It is an arithmetic number, because the mean of its divisors is an integer number (1290240).

Almost surely, 2^61015626 is an apocalyptic number.

61015626 is the 3906-th decagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61015626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82575360).

61015626 is an abundant number, since it is smaller than the sum of its proper divisors (104135094).

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

61015626 is a wasteful number, since it uses less digits than its factorization.

61015626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 61015626 is about 7811.2499639942. The cubic root of 61015626 is about 393.6833283940.

The spelling of 61015626 in words is "sixty-one million, fifteen thousand, six hundred twenty-six".