61729612790 has 16 divisors (see below), whose sum is σ = 111695051520. Its totient is φ = 24562567680.

The previous prime is 61729612771. The next prime is 61729612837. The reversal of 61729612790 is 9721692716.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16157675 + ... + 16161494.

It is an arithmetic number, because the mean of its divisors is an integer number (6980940720).

Almost surely, 2^61729612790 is an apocalyptic number.

61729612790 is a deficient number, since it is larger than the sum of its proper divisors (49965438730).

61729612790 is a wasteful number, since it uses less digits than its factorization.

61729612790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32319367.

The product of its (nonzero) digits is 571536, while the sum is 50.

The spelling of 61729612790 in words is "sixty-one billion, seven hundred twenty-nine million, six hundred twelve thousand, seven hundred ninety".