61404512090 has 8 divisors (see below), whose sum is σ = 110528121780. Its totient is φ = 24561804832.

The previous prime is 61404512077. The next prime is 61404512119. The reversal of 61404512090 is 9021540416.

It can be written as a sum of positive squares in 2 ways, for example, as 56291833081 + 5112679009 = 237259^2 + 71503^2 .

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

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, 3070225595 + ... + 3070225614.

Almost surely, 2^61404512090 is an apocalyptic number.

61404512090 is a deficient number, since it is larger than the sum of its proper divisors (49123609690).

61404512090 is a wasteful number, since it uses less digits than its factorization.

61404512090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6140451216.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 61404512090 in words is "sixty-one billion, four hundred four million, five hundred twelve thousand, ninety".