7138402564777 has 4 divisors (see below), whose sum is σ = 7787348252496. Its totient is φ = 6489456877060.

The previous prime is 7138402564763. The next prime is 7138402564801. The reversal of 7138402564777 is 7774652048317.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7138402564777 - 2¹⁹ = 7138402040489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7138402564877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324472843843 + ... + 324472843864.

It is an arithmetic number, because the mean of its divisors is an integer number (1946837063124).

Almost surely, 2^{7138402564777} is an apocalyptic number.

It is an amenable number.

7138402564777 is a deficient number, since it is larger than the sum of its proper divisors (648945687719).

7138402564777 is a wasteful number, since it uses less digits than its factorization.

7138402564777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648945687718.

The product of its (nonzero) digits is 55319040, while the sum is 61.

The spelling of 7138402564777 in words is "seven trillion, one hundred thirty-eight billion, four hundred two million, five hundred sixty-four thousand, seven hundred seventy-seven".