15222778955999 has 12 divisors (see below), whose sum is σ = 17011213642224. Its totient is φ = 13573251819072.

The previous prime is 15222778955981. The next prime is 15222778956001. The reversal of 15222778955999 is 99955987722251.

15222778955999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15222778955999 - 2¹² = 15222778951903 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 (15222778955939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1240239827 + ... + 1240252100.

It is an arithmetic number, because the mean of its divisors is an integer number (1417601136852).

Almost surely, 2^{15222778955999} is an apocalyptic number.

15222778955999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

15222778955999 is a deficient number, since it is larger than the sum of its proper divisors (1788434686225).

15222778955999 is a wasteful number, since it uses less digits than its factorization.

15222778955999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480491982 (or 2480491963 counting only the distinct ones).

The product of its digits is 2571912000, while the sum is 80.

The spelling of 15222778955999 in words is "fifteen trillion, two hundred twenty-two billion, seven hundred seventy-eight million, nine hundred fifty-five thousand, nine hundred ninety-nine".