1243772461623 has 16 divisors (see below), whose sum is σ = 1679161760640. Its totient is φ = 818792142624.

The previous prime is 1243772461573. The next prime is 1243772461639. The reversal of 1243772461623 is 3261642773421.

It is not a de Polignac number, because 1243772461623 - 2¹⁰ = 1243772460599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243772461423) 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, 705333 + ... + 1727726.

It is an arithmetic number, because the mean of its divisors is an integer number (104947610040).

Almost surely, 2^{1243772461623} is an apocalyptic number.

1243772461623 is a deficient number, since it is larger than the sum of its proper divisors (435389299017).

1243772461623 is a wasteful number, since it uses less digits than its factorization.

1243772461623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2435198.

The product of its digits is 2032128, while the sum is 48.

The spelling of 1243772461623 in words is "one trillion, two hundred forty-three billion, seven hundred seventy-two million, four hundred sixty-one thousand, six hundred twenty-three".