1457477621749 has 2 divisors, whose sum is σ = 1457477621750. Its totient is φ = 1457477621748.

The previous prime is 1457477621723. The next prime is 1457477621777. The reversal of 1457477621749 is 9471267747541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1211914756900 + 245562864849 = 1100870^2 + 495543^2 .

It is a cyclic number.

It is not a de Polignac number, because 1457477621749 - 2¹¹ = 1457477619701 is a prime.

It is a super-2 number, since 2×1457477621749² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1457477621449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 728738810874 + 728738810875.

It is an arithmetic number, because the mean of its divisors is an integer number (728738810875).

Almost surely, 2^{1457477621749} is an apocalyptic number.

It is an amenable number.

1457477621749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1457477621749 is an equidigital number, since it uses as much as digits as its factorization.

1457477621749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82978560, while the sum is 64.

The spelling of 1457477621749 in words is "one trillion, four hundred fifty-seven billion, four hundred seventy-seven million, six hundred twenty-one thousand, seven hundred forty-nine".