705540381551 has 4 divisors (see below), whose sum is σ = 712390288272. Its totient is φ = 698690474832.

The previous prime is 705540381479. The next prime is 705540381571. The reversal of 705540381551 is 155183045507.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155183045507 = 7 ⋅22169006501.

It is a cyclic number.

It is not a de Polignac number, because 705540381551 - 2¹⁰ = 705540380527 is a prime.

It is a super-2 number, since 2×705540381551² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705540381571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3424953206 + ... + 3424953411.

It is an arithmetic number, because the mean of its divisors is an integer number (178097572068).

Almost surely, 2^705540381551 is an apocalyptic number.

705540381551 is a deficient number, since it is larger than the sum of its proper divisors (6849906721).

705540381551 is a wasteful number, since it uses less digits than its factorization.

705540381551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6849906720.

The product of its (nonzero) digits is 420000, while the sum is 44.

The spelling of 705540381551 in words is "seven hundred five billion, five hundred forty million, three hundred eighty-one thousand, five hundred fifty-one".