121645351771746 has 64 divisors (see below), whose sum is σ = 286497434833920. Its totient is φ = 34043676645440.

The previous prime is 121645351771681. The next prime is 121645351771793. The reversal of 121645351771746 is 647177153546121.

It is a self number, because there is not a number n which added to its sum of digits gives 121645351771746.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1381598700 + ... + 1381686743.

It is an arithmetic number, because the mean of its divisors is an integer number (4476522419280).

Almost surely, 2^{121645351771746} is an apocalyptic number.

121645351771746 is an abundant number, since it is smaller than the sum of its proper divisors (164852083062174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121645351771746 is a wasteful number, since it uses less digits than its factorization.

121645351771746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2763285511.

The product of its digits is 29635200, while the sum is 60.

The spelling of 121645351771746 in words is "one hundred twenty-one trillion, six hundred forty-five billion, three hundred fifty-one million, seven hundred seventy-one thousand, seven hundred forty-six".