261426070682076 has 96 divisors (see below), whose sum is σ = 645465126476800. Its totient is φ = 82122880942080.

The previous prime is 261426070682017. The next prime is 261426070682087. The reversal of 261426070682076 is 670286070624162.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 763694316 + ... + 764036556.

Almost surely, 2^{261426070682076} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261426070682076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322732563238400).

261426070682076 is an abundant number, since it is smaller than the sum of its proper divisors (384039055794724).

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

261426070682076 is a wasteful number, since it uses less digits than its factorization.

261426070682076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359819 (or 359817 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 57.

The spelling of 261426070682076 in words is "two hundred sixty-one trillion, four hundred twenty-six billion, seventy million, six hundred eighty-two thousand, seventy-six".