61560280 has 32 divisors (see below), whose sum is σ = 138756240. Its totient is φ = 24580480.

The previous prime is 61560277. The next prime is 61560283. The reversal of 61560280 is 8206516.

It is an interprime number because it is at equal distance from previous prime (61560277) and next prime (61560283).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61560283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30915 + ... + 32845.

Almost surely, 2^61560280 is an apocalyptic number.

It is an amenable number.

61560280 is an abundant number, since it is smaller than the sum of its proper divisors (77195960).

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

61560280 is a wasteful number, since it uses less digits than its factorization.

61560280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739 (or 2735 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 61560280 is about 7846.0359417989. The cubic root of 61560280 is about 394.8512605609.

Adding to 61560280 its reverse (8206516), we get a palindrome (69766796).

The spelling of 61560280 in words is "sixty-one million, five hundred sixty thousand, two hundred eighty".