261477061602 has 8 divisors (see below), whose sum is σ = 522954123216. Its totient is φ = 87159020532.

The previous prime is 261477061583. The next prime is 261477061619. The reversal of 261477061602 is 206160774162.

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

261477061602 is an admirable number.

It is a super-2 number, since 2×261477061602² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21789755128 + ... + 21789755139.

It is an arithmetic number, because the mean of its divisors is an integer number (65369265402).

Almost surely, 2^261477061602 is an apocalyptic number.

261477061602 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261477061602 is a wasteful number, since it uses less digits than its factorization.

261477061602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43579510272.

The product of its (nonzero) digits is 169344, while the sum is 42.

The spelling of 261477061602 in words is "two hundred sixty-one billion, four hundred seventy-seven million, sixty-one thousand, six hundred two".