2123154523545 has 16 divisors (see below), whose sum is σ = 3705869714112. Its totient is φ = 1029408253760.

The previous prime is 2123154523531. The next prime is 2123154523559. The reversal of 2123154523545 is 5453254513212.

It is an interprime number because it is at equal distance from previous prime (2123154523531) and next prime (2123154523559).

It is not a de Polignac number, because 2123154523545 - 2⁵ = 2123154523513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123154523497 and 2123154523506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6433801422 + ... + 6433801751.

It is an arithmetic number, because the mean of its divisors is an integer number (231616857132).

Almost surely, 2^{2123154523545} is an apocalyptic number.

It is an amenable number.

2123154523545 is a deficient number, since it is larger than the sum of its proper divisors (1582715190567).

2123154523545 is a wasteful number, since it uses less digits than its factorization.

2123154523545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12867603192.

The product of its digits is 720000, while the sum is 42.

The spelling of 2123154523545 in words is "two trillion, one hundred twenty-three billion, one hundred fifty-four million, five hundred twenty-three thousand, five hundred forty-five".