121739566634 has 16 divisors (see below), whose sum is σ = 208701337536. Its totient is φ = 52172865600.

The previous prime is 121739566567. The next prime is 121739566687. The reversal of 121739566634 is 436665937121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 759029 + ... + 905319.

It is an arithmetic number, because the mean of its divisors is an integer number (13043833596).

Almost surely, 2^121739566634 is an apocalyptic number.

121739566634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

121739566634 is a deficient number, since it is larger than the sum of its proper divisors (86961770902).

121739566634 is a wasteful number, since it uses less digits than its factorization.

121739566634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205741.

The product of its digits is 4898880, while the sum is 53.

The spelling of 121739566634 in words is "one hundred twenty-one billion, seven hundred thirty-nine million, five hundred sixty-six thousand, six hundred thirty-four".