61409759999 has 16 divisors (see below), whose sum is σ = 72642131520. Its totient is φ = 50794248960.

The previous prime is 61409759993. The next prime is 61409760011. The reversal of 61409759999 is 99995790416.

It is not a de Polignac number, because 61409759999 - 2³² = 57114792703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61409759993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296507 + ... + 459059.

It is an arithmetic number, because the mean of its divisors is an integer number (4540133220).

Almost surely, 2^61409759999 is an apocalyptic number.

61409759999 is a deficient number, since it is larger than the sum of its proper divisors (11232371521).

61409759999 is a wasteful number, since it uses less digits than its factorization.

61409759999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164450.

The product of its (nonzero) digits is 49601160, while the sum is 68.

The spelling of 61409759999 in words is "sixty-one billion, four hundred nine million, seven hundred fifty-nine thousand, nine hundred ninety-nine".