78650007157 has 4 divisors (see below), whose sum is σ = 78651349920. Its totient is φ = 78648664396.

The previous prime is 78650007143. The next prime is 78650007269. The reversal of 78650007157 is 75170005687.

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 78650007157 - 2¹⁹ = 78649482869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78650002157) 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, 579313 + ... + 702070.

It is an arithmetic number, because the mean of its divisors is an integer number (19662837480).

Almost surely, 2^78650007157 is an apocalyptic number.

It is an amenable number.

78650007157 is a deficient number, since it is larger than the sum of its proper divisors (1342763).

78650007157 is a wasteful number, since it uses less digits than its factorization.

78650007157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342762.

The product of its (nonzero) digits is 411600, while the sum is 46.

The spelling of 78650007157 in words is "seventy-eight billion, six hundred fifty million, seven thousand, one hundred fifty-seven".