61407812 has 6 divisors (see below), whose sum is σ = 107463678. Its totient is φ = 30703904.

The previous prime is 61407811. The next prime is 61407821. The reversal of 61407812 is 21870416.

It can be written as a sum of positive squares in only one way, i.e., 31091776 + 30316036 = 5576^2 + 5506^2 .

It is not an unprimeable number, because it can be changed into a prime (61407811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7675973 + ... + 7675980.

It is an arithmetic number, because the mean of its divisors is an integer number (17910613).

Almost surely, 2^61407812 is an apocalyptic number.

It is an amenable number.

61407812 is a deficient number, since it is larger than the sum of its proper divisors (46055866).

61407812 is a wasteful number, since it uses less digits than its factorization.

61407812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15351957 (or 15351955 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 61407812 is about 7836.3136741710. The cubic root of 61407812 is about 394.5250114928.

The spelling of 61407812 in words is "sixty-one million, four hundred seven thousand, eight hundred twelve".