61346540 has 48 divisors (see below), whose sum is σ = 138493152. Its totient is φ = 22742016.

The previous prime is 61346539. The next prime is 61346567. The reversal of 61346540 is 4564316.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21434 + ... + 24126.

It is an arithmetic number, because the mean of its divisors is an integer number (2885274).

Almost surely, 2^61346540 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 61346540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69246576).

61346540 is an abundant number, since it is smaller than the sum of its proper divisors (77146612).

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

61346540 is a wasteful number, since it uses less digits than its factorization.

61346540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786 (or 2784 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 61346540 is about 7832.4032071900. The cubic root of 61346540 is about 394.3937503381.

The spelling of 61346540 in words is "sixty-one million, three hundred forty-six thousand, five hundred forty".