7276772578781 has 2 divisors, whose sum is σ = 7276772578782. Its totient is φ = 7276772578780.

The previous prime is 7276772578769. The next prime is 7276772578799. The reversal of 7276772578781 is 1878752776727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6123867876025 + 1152904702756 = 2474645^2 + 1073734^2 .

It is a cyclic number.

It is not a de Polignac number, because 7276772578781 - 2¹⁸ = 7276772316637 is a prime.

It is a super-2 number, since 2×7276772578781² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7276772578699 and 7276772578708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7276772578381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3638386289390 + 3638386289391.

It is an arithmetic number, because the mean of its divisors is an integer number (3638386289391).

Almost surely, 2^{7276772578781} is an apocalyptic number.

It is an amenable number.

7276772578781 is a deficient number, since it is larger than the sum of its proper divisors (1).

7276772578781 is an equidigital number, since it uses as much as digits as its factorization.

7276772578781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903544320, while the sum is 74.

The spelling of 7276772578781 in words is "seven trillion, two hundred seventy-six billion, seven hundred seventy-two million, five hundred seventy-eight thousand, seven hundred eighty-one".