68807737415 has 4 divisors (see below), whose sum is σ = 82569284904. Its totient is φ = 55046189928.

The previous prime is 68807737409. The next prime is 68807737421. The reversal of 68807737415 is 51473770886.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51473770886 = 2 ⋅25736885443.

It is an interprime number because it is at equal distance from previous prime (68807737409) and next prime (68807737421).

It is a cyclic number.

It is not a de Polignac number, because 68807737415 - 2⁴ = 68807737399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6880773737 + ... + 6880773746.

It is an arithmetic number, because the mean of its divisors is an integer number (20642321226).

Almost surely, 2^68807737415 is an apocalyptic number.

68807737415 is a deficient number, since it is larger than the sum of its proper divisors (13761547489).

68807737415 is a wasteful number, since it uses less digits than its factorization.

68807737415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13761547488.

The product of its (nonzero) digits is 7902720, while the sum is 56.

The spelling of 68807737415 in words is "sixty-eight billion, eight hundred seven million, seven hundred thirty-seven thousand, four hundred fifteen".