78491702937601 has 4 divisors (see below), whose sum is σ = 78492036190000. Its totient is φ = 78491369685204.

The previous prime is 78491702937517. The next prime is 78491702937611. The reversal of 78491702937601 is 10673920719487.

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 78491702937601 - 2³⁹ = 77941947123713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78491702937611) 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, 166272651 + ... + 166744048.

It is an arithmetic number, because the mean of its divisors is an integer number (19623009047500).

Almost surely, 2^{78491702937601} is an apocalyptic number.

It is an amenable number.

78491702937601 is a deficient number, since it is larger than the sum of its proper divisors (333252399).

78491702937601 is a wasteful number, since it uses less digits than its factorization.

78491702937601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333252398.

The product of its (nonzero) digits is 32006016, while the sum is 64.

The spelling of 78491702937601 in words is "seventy-eight trillion, four hundred ninety-one billion, seven hundred two million, nine hundred thirty-seven thousand, six hundred one".