7497977470549 has 2 divisors, whose sum is σ = 7497977470550. Its totient is φ = 7497977470548.

The previous prime is 7497977470531. The next prime is 7497977470637. The reversal of 7497977470549 is 9450747797947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6398279188324 + 1099698282225 = 2529482^2 + 1048665^2 .

It is a cyclic number.

It is not a de Polignac number, because 7497977470549 - 2⁹ = 7497977470037 is a prime.

It is a super-2 number, since 2×7497977470549² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7497977471549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3748988735274 + 3748988735275.

It is an arithmetic number, because the mean of its divisors is an integer number (3748988735275).

Almost surely, 2^{7497977470549} is an apocalyptic number.

It is an amenable number.

7497977470549 is a deficient number, since it is larger than the sum of its proper divisors (1).

7497977470549 is an equidigital number, since it uses as much as digits as its factorization.

7497977470549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920736960, while the sum is 79.

The spelling of 7497977470549 in words is "seven trillion, four hundred ninety-seven billion, nine hundred seventy-seven million, four hundred seventy thousand, five hundred forty-nine".