261420547948868 has 48 divisors (see below), whose sum is σ = 570414460694400. Its totient is φ = 101844597953280.

The previous prime is 261420547948841. The next prime is 261420547948897. The reversal of 261420547948868 is 868849745024162.

261420547948868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 261420547948795 and 261420547948804.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27359753 + ... + 35656656.

It is an arithmetic number, because the mean of its divisors is an integer number (11883634597800).

Almost surely, 2^{261420547948868} is an apocalyptic number.

261420547948868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

261420547948868 is an abundant number, since it is smaller than the sum of its proper divisors (308993912745532).

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

261420547948868 is a wasteful number, since it uses less digits than its factorization.

261420547948868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63029900 (or 63029898 counting only the distinct ones).

The product of its (nonzero) digits is 1486356480, while the sum is 74.

The spelling of 261420547948868 in words is "two hundred sixty-one trillion, four hundred twenty billion, five hundred forty-seven million, nine hundred forty-eight thousand, eight hundred sixty-eight".