2642456709 has 16 divisors (see below), whose sum is σ = 4041034240. Its totient is φ = 1704810240.

The previous prime is 2642456627. The next prime is 2642456767. The reversal of 2642456709 is 9076542462.

2642456709 is a `hidden beast` number, since 2 + 64 + 24 + 567 + 0 + 9 = 666.

It is not a de Polignac number, because 2642456709 - 2¹⁵ = 2642423941 is a prime.

It is a super-2 number, since 2×2642456709² = 13965154917878221362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2642456779) 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, 1577692 + ... + 1579365.

It is an arithmetic number, because the mean of its divisors is an integer number (252564640).

Almost surely, 2^2642456709 is an apocalyptic number.

It is an amenable number.

2642456709 is a deficient number, since it is larger than the sum of its proper divisors (1398577531).

2642456709 is a wasteful number, since it uses less digits than its factorization.

2642456709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157097 (or 3157091 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 2642456709 is about 51404.8315725283. The cubic root of 2642456709 is about 1382.5132226586.

The spelling of 2642456709 in words is "two billion, six hundred forty-two million, four hundred fifty-six thousand, seven hundred nine".