61015740 has 24 divisors (see below), whose sum is σ = 170844240. Its totient is φ = 16270848.

The previous prime is 61015727. The next prime is 61015769. The reversal of 61015740 is 4751016.

61015740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61015740.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508405 + ... + 508524.

It is an arithmetic number, because the mean of its divisors is an integer number (7118510).

Almost surely, 2^61015740 is an apocalyptic number.

61015740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61015740 is an abundant number, since it is smaller than the sum of its proper divisors (109828500).

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

61015740 is a wasteful number, since it uses less digits than its factorization.

61015740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016941 (or 1016939 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 61015740 is about 7811.2572611584. The cubic root of 61015740 is about 393.6835735764.

Adding to 61015740 its reverse (4751016), we get a palindrome (65766756).

The spelling of 61015740 in words is "sixty-one million, fifteen thousand, seven hundred forty".