61405546 has 8 divisors (see below), whose sum is σ = 92155140. Its totient is φ = 30687168.

The previous prime is 61405541. The next prime is 61405579. The reversal of 61405546 is 64550416.

It can be written as a sum of positive squares in 2 ways, for example, as 59459521 + 1946025 = 7711^2 + 1395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (61405541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2031 + ... + 11266.

Almost surely, 2^61405546 is an apocalyptic number.

61405546 is a deficient number, since it is larger than the sum of its proper divisors (30749594).

61405546 is a wasteful number, since it uses less digits than its factorization.

61405546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15608.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 61405546 is about 7836.1690895488. The cubic root of 61405546 is about 394.5201586646.

The spelling of 61405546 in words is "sixty-one million, four hundred five thousand, five hundred forty-six".