8034521787961 has 2 divisors, whose sum is σ = 8034521787962. Its totient is φ = 8034521787960.

The previous prime is 8034521787823. The next prime is 8034521787967. The reversal of 8034521787961 is 1697871254308.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8034390250000 + 131537961 = 2834500^2 + 11469^2 .

It is a cyclic number.

It is not a de Polignac number, because 8034521787961 - 2²⁷ = 8034387570233 is a prime.

It is a super-2 number, since 2×8034521787961² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8034521787961.

It is not a weakly prime, because it can be changed into another prime (8034521787967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4017260893980 + 4017260893981.

It is an arithmetic number, because the mean of its divisors is an integer number (4017260893981).

It is a 1-persistent number, because it is pandigital, but 2⋅8034521787961 = 16069043575922 is not.

Almost surely, 2^{8034521787961} is an apocalyptic number.

It is an amenable number.

8034521787961 is a deficient number, since it is larger than the sum of its proper divisors (1).

8034521787961 is an equidigital number, since it uses as much as digits as its factorization.

8034521787961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 8034521787961 in words is "eight trillion, thirty-four billion, five hundred twenty-one million, seven hundred eighty-seven thousand, nine hundred sixty-one".