1231456774650 has 48 divisors (see below), whose sum is σ = 3069836773824. Its totient is φ = 326686970880.

The previous prime is 1231456774571. The next prime is 1231456774663. The reversal of 1231456774650 is 564776541321.

It is a junction number, because it is equal to n+sod(n) for n = 1231456774593 and 1231456774602.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21239734 + ... + 21297633.

It is an arithmetic number, because the mean of its divisors is an integer number (63954932788).

Almost surely, 2^{1231456774650} is an apocalyptic number.

1231456774650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231456774650 is an abundant number, since it is smaller than the sum of its proper divisors (1838379999174).

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

1231456774650 is a wasteful number, since it uses less digits than its factorization.

1231456774650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42537575 (or 42537570 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 51.

The spelling of 1231456774650 in words is "one trillion, two hundred thirty-one billion, four hundred fifty-six million, seven hundred seventy-four thousand, six hundred fifty".