7421755504477 has 2 divisors, whose sum is σ = 7421755504478. Its totient is φ = 7421755504476.

The previous prime is 7421755504453. The next prime is 7421755504481. The reversal of 7421755504477 is 7744055571247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6824874102916 + 596881401561 = 2612446^2 + 772581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7421755504477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7421755504447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3710877752238 + 3710877752239.

It is an arithmetic number, because the mean of its divisors is an integer number (3710877752239).

Almost surely, 2^{7421755504477} is an apocalyptic number.

It is an amenable number.

7421755504477 is a deficient number, since it is larger than the sum of its proper divisors (1).

7421755504477 is an equidigital number, since it uses as much as digits as its factorization.

7421755504477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38416000, while the sum is 58.

The spelling of 7421755504477 in words is "seven trillion, four hundred twenty-one billion, seven hundred fifty-five million, five hundred four thousand, four hundred seventy-seven".