79827505251 has 16 divisors (see below), whose sum is σ = 121366705824. Its totient is φ = 46234934784.

The previous prime is 79827505249. The next prime is 79827505267. The reversal of 79827505251 is 15250572897.

It is not a de Polignac number, because 79827505251 - 2¹ = 79827505249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 79827505194 and 79827505203.

It is not an unprimeable number, because it can be changed into a prime (79827505271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60201076 + ... + 60202401.

It is an arithmetic number, because the mean of its divisors is an integer number (7585419114).

Almost surely, 2^79827505251 is an apocalyptic number.

79827505251 is a deficient number, since it is larger than the sum of its proper divisors (41539200573).

79827505251 is a wasteful number, since it uses less digits than its factorization.

79827505251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120403510.

The product of its (nonzero) digits is 1764000, while the sum is 51.

The spelling of 79827505251 in words is "seventy-nine billion, eight hundred twenty-seven million, five hundred five thousand, two hundred fifty-one".