1015452220649 has 2 divisors, whose sum is σ = 1015452220650. Its totient is φ = 1015452220648.

The previous prime is 1015452220529. The next prime is 1015452220691. The reversal of 1015452220649 is 9460222545101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 612982516624 + 402469704025 = 782932^2 + 634405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1015452220649 is a prime.

It is a super-2 number, since 2×1015452220649² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1015452270649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 507726110324 + 507726110325.

It is an arithmetic number, because the mean of its divisors is an integer number (507726110325).

Almost surely, 2^{1015452220649} is an apocalyptic number.

It is an amenable number.

1015452220649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1015452220649 is an equidigital number, since it uses as much as digits as its factorization.

1015452220649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 1015452220649 in words is "one trillion, fifteen billion, four hundred fifty-two million, two hundred twenty thousand, six hundred forty-nine".