102791220872 has 36 divisors (see below), whose sum is σ = 193919078535. Its totient is φ = 51081395920.

The previous prime is 102791220787. The next prime is 102791220943. The reversal of 102791220872 is 278022197201.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 51395610436 + 51395610436 = 226706^2 + 226706^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=226706.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 238494497 + ... + 238494927.

Almost surely, 2^102791220872 is an apocalyptic number.

It is an amenable number.

102791220872 is a deficient number, since it is larger than the sum of its proper divisors (91127857663).

102791220872 is an frugal number, since it uses more digits than its factorization.

102791220872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 41.

The spelling of 102791220872 in words is "one hundred two billion, seven hundred ninety-one million, two hundred twenty thousand, eight hundred seventy-two".