61451980 has 24 divisors (see below), whose sum is σ = 129366720. Its totient is φ = 24520320.

The previous prime is 61451959. The next prime is 61451987. The reversal of 61451980 is 8915416.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61451987) 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, 5056 + ... + 12184.

It is an arithmetic number, because the mean of its divisors is an integer number (5390280).

Almost surely, 2^61451980 is an apocalyptic number.

It is an amenable number.

61451980 is an abundant number, since it is smaller than the sum of its proper divisors (67914740).

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

61451980 is a wasteful number, since it uses less digits than its factorization.

61451980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7569 (or 7567 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 61451980 is about 7839.1313294267. The cubic root of 61451980 is about 394.6195771190.

The spelling of 61451980 in words is "sixty-one million, four hundred fifty-one thousand, nine hundred eighty".