61081008 has 80 divisors (see below), whose sum is σ = 167536896. Its totient is φ = 19134720.

The previous prime is 61081003. The next prime is 61081037. The reversal of 61081008 is 80018016.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (61081003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66891 + ... + 67797.

Almost surely, 2^61081008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61081008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83768448).

61081008 is an abundant number, since it is smaller than the sum of its proper divisors (106455888).

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

61081008 is a wasteful number, since it uses less digits than its factorization.

61081008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002 (or 996 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 61081008 is about 7815.4339610798. The cubic root of 61081008 is about 393.8238968386.

It can be divided in two parts, 610 and 81008, that added together give a palindrome (81618).

The spelling of 61081008 in words is "sixty-one million, eighty-one thousand, eight".