78041687732 has 6 divisors (see below), whose sum is σ = 136572953538. Its totient is φ = 39020843864.

The previous prime is 78041687701. The next prime is 78041687827. The reversal of 78041687732 is 23778614087.

It can be written as a sum of positive squares in only one way, i.e., 49316861476 + 28724826256 = 222074^2 + 169484^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9755210963 + ... + 9755210970.

It is an arithmetic number, because the mean of its divisors is an integer number (22762158923).

Almost surely, 2^78041687732 is an apocalyptic number.

It is an amenable number.

78041687732 is a deficient number, since it is larger than the sum of its proper divisors (58531265806).

78041687732 is a wasteful number, since it uses less digits than its factorization.

78041687732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19510421937 (or 19510421935 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 53.

The spelling of 78041687732 in words is "seventy-eight billion, forty-one million, six hundred eighty-seven thousand, seven hundred thirty-two".