1011662057521 has 2 divisors, whose sum is σ = 1011662057522. Its totient is φ = 1011662057520.

The previous prime is 1011662057383. The next prime is 1011662057537. The reversal of 1011662057521 is 1257502661101.

1011662057521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 766771679025 + 244890378496 = 875655^2 + 494864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011662057521 - 2²³ = 1011653668913 is a prime.

It is a super-2 number, since 2×1011662057521² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1011662052521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505831028760 + 505831028761.

It is an arithmetic number, because the mean of its divisors is an integer number (505831028761).

Almost surely, 2^{1011662057521} is an apocalyptic number.

It is an amenable number.

1011662057521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011662057521 is an equidigital number, since it uses as much as digits as its factorization.

1011662057521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 1011662057521 in words is "one trillion, eleven billion, six hundred sixty-two million, fifty-seven thousand, five hundred twenty-one".