261602770556451 has 8 divisors (see below), whose sum is σ = 348894980061264. Its totient is φ = 174356204044640.

The previous prime is 261602770556423. The next prime is 261602770556483. The reversal of 261602770556451 is 154655077206162.

261602770556451 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 261602770556451 - 2⁹ = 261602770555939 is a prime.

It is a super-2 number, since 2×261602770556451² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261602770556391 and 261602770556400.

It is not an unprimeable number, because it can be changed into a prime (261602770554451) 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, 11410734876 + ... + 11410757801.

It is an arithmetic number, because the mean of its divisors is an integer number (43611872507658).

Almost surely, 2^{261602770556451} is an apocalyptic number.

261602770556451 is a deficient number, since it is larger than the sum of its proper divisors (87292209504813).

261602770556451 is a wasteful number, since it uses less digits than its factorization.

261602770556451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22821496501.

The product of its (nonzero) digits is 21168000, while the sum is 57.

The spelling of 261602770556451 in words is "two hundred sixty-one trillion, six hundred two billion, seven hundred seventy million, five hundred fifty-six thousand, four hundred fifty-one".