61956280 has 32 divisors (see below), whose sum is σ = 140001840. Its totient is φ = 24675840.

The previous prime is 61956277. The next prime is 61956287. The reversal of 61956280 is 8265916.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61956287) 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, 6427 + ... + 12853.

Almost surely, 2^61956280 is an apocalyptic number.

61956280 is the 6427-th pentagonal number.

It is an amenable number.

61956280 is an abundant number, since it is smaller than the sum of its proper divisors (78045560).

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

61956280 is a wasteful number, since it uses less digits than its factorization.

61956280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6679 (or 6675 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 61956280 is about 7871.2311616417. The cubic root of 61956280 is about 395.6961073602.

The spelling of 61956280 in words is "sixty-one million, nine hundred fifty-six thousand, two hundred eighty".