78463034756681 has 4 divisors (see below), whose sum is σ = 80376767311764. Its totient is φ = 76549302201600.

The previous prime is 78463034756653. The next prime is 78463034756737. The reversal of 78463034756681 is 18665743036487.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13962299131456 + 64500735625225 = 3736616^2 + 8031235^2 .

It is a cyclic number.

It is not a de Polignac number, because 78463034756681 - 2²⁶ = 78462967647817 is a prime.

It is a super-2 number, since 2×78463034756681² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78463034753681) 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, 956866277480 + ... + 956866277561.

It is an arithmetic number, because the mean of its divisors is an integer number (20094191827941).

Almost surely, 2^{78463034756681} is an apocalyptic number.

It is an amenable number.

78463034756681 is a deficient number, since it is larger than the sum of its proper divisors (1913732555083).

78463034756681 is a wasteful number, since it uses less digits than its factorization.

78463034756681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913732555082.

The product of its (nonzero) digits is 487710720, while the sum is 68.

The spelling of 78463034756681 in words is "seventy-eight trillion, four hundred sixty-three billion, thirty-four million, seven hundred fifty-six thousand, six hundred eighty-one".