7265563969638 has 32 divisors (see below), whose sum is σ = 16071850450656. Its totient is φ = 2175137653248.

The previous prime is 7265563969607. The next prime is 7265563969681. The reversal of 7265563969638 is 8369693655627.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7265563969638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1258757331 + ... + 1258763102.

It is an arithmetic number, because the mean of its divisors is an integer number (502245326583).

Almost surely, 2^{7265563969638} is an apocalyptic number.

7265563969638 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

7265563969638 is an abundant number, since it is smaller than the sum of its proper divisors (8806286481018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7265563969638 is a wasteful number, since it uses less digits than its factorization.

7265563969638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517520488.

The product of its digits is 2645395200, while the sum is 75.

The spelling of 7265563969638 in words is "seven trillion, two hundred sixty-five billion, five hundred sixty-three million, nine hundred sixty-nine thousand, six hundred thirty-eight".