67492901521 has 2 divisors, whose sum is σ = 67492901522. Its totient is φ = 67492901520.

The previous prime is 67492901447. The next prime is 67492901551. The reversal of 67492901521 is 12510929476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67379180625 + 113720896 = 259575^2 + 10664^2 .

It is a cyclic number.

It is not a de Polignac number, because 67492901521 - 2⁹ = 67492901009 is a prime.

It is a super-2 number, since 2×67492901521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67492901551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33746450760 + 33746450761.

It is an arithmetic number, because the mean of its divisors is an integer number (33746450761).

Almost surely, 2^67492901521 is an apocalyptic number.

It is an amenable number.

67492901521 is a deficient number, since it is larger than the sum of its proper divisors (1).

67492901521 is an equidigital number, since it uses as much as digits as its factorization.

67492901521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 67492901521 in words is "sixty-seven billion, four hundred ninety-two million, nine hundred one thousand, five hundred twenty-one".