61413540 has 48 divisors (see below), whose sum is σ = 174535872. Its totient is φ = 16131456.

The previous prime is 61413523. The next prime is 61413557. The reversal of 61413540 is 4531416.

It is an interprime number because it is at equal distance from previous prime (61413523) and next prime (61413557).

It is a self number, because there is not a number n which added to its sum of digits gives 61413540.

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 15 ways as a sum of consecutive naturals, for example, 3619 + ... + 11658.

It is an arithmetic number, because the mean of its divisors is an integer number (3636164).

Almost surely, 2^61413540 is an apocalyptic number.

61413540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61413540 is an abundant number, since it is smaller than the sum of its proper divisors (113122332).

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

61413540 is a wasteful number, since it uses less digits than its factorization.

61413540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15356 (or 15354 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 61413540 is about 7836.6791436169. The cubic root of 61413540 is about 394.5372779506.

Adding to 61413540 its reverse (4531416), we get a palindrome (65944956).

The spelling of 61413540 in words is "sixty-one million, four hundred thirteen thousand, five hundred forty".