2720505071421 has 6 divisors (see below), whose sum is σ = 3929618436510. Its totient is φ = 1813670047608.

The previous prime is 2720505071399. The next prime is 2720505071467. The reversal of 2720505071421 is 1241705050272.

2720505071421 is a `hidden beast` number, since 2 + 7 + 2 + 0 + 5 + 0 + 507 + 142 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2327488923321 + 393016148100 = 1525611^2 + 626910^2 .

It is not a de Polignac number, because 2720505071421 - 2¹³ = 2720505063229 is a prime.

It is a super-2 number, since 2×2720505071421² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720505071821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151139170626 + ... + 151139170643.

It is an arithmetic number, because the mean of its divisors is an integer number (654936406085).

Almost surely, 2^{2720505071421} is an apocalyptic number.

It is an amenable number.

2720505071421 is a deficient number, since it is larger than the sum of its proper divisors (1209113365089).

2720505071421 is a wasteful number, since it uses less digits than its factorization.

2720505071421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302278341275 (or 302278341272 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The spelling of 2720505071421 in words is "two trillion, seven hundred twenty billion, five hundred five million, seventy-one thousand, four hundred twenty-one".