261192549948 has 96 divisors (see below), whose sum is σ = 715894744320. Its totient is φ = 73230781440.

The previous prime is 261192549901. The next prime is 261192549973. The reversal of 261192549948 is 849945291162.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 261192549891 and 261192549900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 854011 + ... + 1118802.

It is an arithmetic number, because the mean of its divisors is an integer number (7457236920).

Almost surely, 2^261192549948 is an apocalyptic number.

It is an amenable number.

261192549948 is an abundant number, since it is smaller than the sum of its proper divisors (454702194372).

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

261192549948 is a wasteful number, since it uses less digits than its factorization.

261192549948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972907 (or 1972905 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 60.

The spelling of 261192549948 in words is "two hundred sixty-one billion, one hundred ninety-two million, five hundred forty-nine thousand, nine hundred forty-eight".