121577451806 has 8 divisors (see below), whose sum is σ = 182519817480. Its totient is φ = 60737512648.

The previous prime is 121577451799. The next prime is 121577451857. The reversal of 121577451806 is 608154775121.

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

It is a congruent number.

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, 25603661 + ... + 25608408.

It is an arithmetic number, because the mean of its divisors is an integer number (22814977185).

Almost surely, 2^121577451806 is an apocalyptic number.

121577451806 is a deficient number, since it is larger than the sum of its proper divisors (60942365674).

121577451806 is a wasteful number, since it uses less digits than its factorization.

121577451806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51213258.

The product of its (nonzero) digits is 470400, while the sum is 47.

The spelling of 121577451806 in words is "one hundred twenty-one billion, five hundred seventy-seven million, four hundred fifty-one thousand, eight hundred six".