261770297853 has 8 divisors (see below), whose sum is σ = 349596441568. Its totient is φ = 174228843024.

The previous prime is 261770297807. The next prime is 261770297879. The reversal of 261770297853 is 358792077162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261770297853 - 2²⁵ = 261736743421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261770297793 and 261770297802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261770297153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71170075 + ... + 71173752.

It is an arithmetic number, because the mean of its divisors is an integer number (43699555196).

Almost surely, 2^261770297853 is an apocalyptic number.

It is an amenable number.

261770297853 is a deficient number, since it is larger than the sum of its proper divisors (87826143715).

261770297853 is a wasteful number, since it uses less digits than its factorization.

261770297853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142344443.

The product of its (nonzero) digits is 8890560, while the sum is 57.

The spelling of 261770297853 in words is "two hundred sixty-one billion, seven hundred seventy million, two hundred ninety-seven thousand, eight hundred fifty-three".