61456040 has 16 divisors (see below), whose sum is σ = 138276180. Its totient is φ = 24582400.

The previous prime is 61456033. The next prime is 61456063. The reversal of 61456040 is 4065416.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 61246276 + 209764 = 7826^2 + 458^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768161 + ... + 768240.

Almost surely, 2^61456040 is an apocalyptic number.

It is an amenable number.

61456040 is an abundant number, since it is smaller than the sum of its proper divisors (76820140).

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

61456040 is a wasteful number, since it uses less digits than its factorization.

61456040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536412 (or 1536408 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 61456040 is about 7839.3902824136. The cubic root of 61456040 is about 394.6282674829.

The spelling of 61456040 in words is "sixty-one million, four hundred fifty-six thousand, forty".