1223451511455 has 64 divisors (see below), whose sum is σ = 2010835584000. Its totient is φ = 635001016320.

The previous prime is 1223451511417. The next prime is 1223451511493. The reversal of 1223451511455 is 5541151543221.

It is an interprime number because it is at equal distance from previous prime (1223451511417) and next prime (1223451511493).

It is not a de Polignac number, because 1223451511455 - 2¹⁹ = 1223450987167 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32574447 + ... + 32611983.

It is an arithmetic number, because the mean of its divisors is an integer number (31419306000).

Almost surely, 2^{1223451511455} is an apocalyptic number.

1223451511455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1223451511455 is a deficient number, since it is larger than the sum of its proper divisors (787384072545).

1223451511455 is a wasteful number, since it uses less digits than its factorization.

1223451511455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37984.

The product of its digits is 120000, while the sum is 39.

The spelling of 1223451511455 in words is "one trillion, two hundred twenty-three billion, four hundred fifty-one million, five hundred eleven thousand, four hundred fifty-five".