272219378271561 has 64 divisors (see below), whose sum is σ = 467256290342400. Its totient is φ = 155332021420800.

The previous prime is 272219378271551. The next prime is 272219378271593. The reversal of 272219378271561 is 165172873912272.

272219378271561 is a `hidden beast` number, since 2 + 7 + 2 + 2 + 19 + 37 + 8 + 27 + 1 + 561 = 666.

It is not a de Polignac number, because 272219378271561 - 2⁷ = 272219378271433 is a prime.

It is a super-2 number, since 2×272219378271561² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (272219378271541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1951456 + ... + 23414673.

It is an arithmetic number, because the mean of its divisors is an integer number (7300879536600).

Almost surely, 2^{272219378271561} is an apocalyptic number.

272219378271561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

272219378271561 is a deficient number, since it is larger than the sum of its proper divisors (195036912070839).

272219378271561 is an frugal number, since it uses more digits than its factorization.

272219378271561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25366858 (or 25366840 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 63.

The spelling of 272219378271561 in words is "two hundred seventy-two trillion, two hundred nineteen billion, three hundred seventy-eight million, two hundred seventy-one thousand, five hundred sixty-one".