2145656120002 has 32 divisors (see below), whose sum is σ = 3313291833072. Its totient is φ = 1041364905984.

The previous prime is 2145656119993. The next prime is 2145656120009. The reversal of 2145656120002 is 2000216565412.

It can be written as a sum of positive squares in 8 ways, for example, as 46457922681 + 2099198197321 = 215541^2 + 1448861^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2145656120002.

It is not an unprimeable number, because it can be changed into a prime (2145656120009) 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, 77187418 + ... + 77215210.

Almost surely, 2^{2145656120002} is an apocalyptic number.

2145656120002 is a deficient number, since it is larger than the sum of its proper divisors (1167635713070).

2145656120002 is a wasteful number, since it uses less digits than its factorization.

2145656120002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30262.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 2145656120002 in words is "two trillion, one hundred forty-five billion, six hundred fifty-six million, one hundred twenty thousand, two".