261076773542 has 32 divisors (see below), whose sum is σ = 445841716320. Its totient is φ = 113665040640.

The previous prime is 261076773521. The next prime is 261076773577. The reversal of 261076773542 is 245377670162.

It is a super-2 number, since 2×261076773542² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 1019009 + ... + 1249212.

It is an arithmetic number, because the mean of its divisors is an integer number (13932553635).

Almost surely, 2^261076773542 is an apocalyptic number.

261076773542 is a deficient number, since it is larger than the sum of its proper divisors (184764942778).

261076773542 is a wasteful number, since it uses less digits than its factorization.

261076773542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268488.

The product of its (nonzero) digits is 2963520, while the sum is 50.

The spelling of 261076773542 in words is "two hundred sixty-one billion, seventy-six million, seven hundred seventy-three thousand, five hundred forty-two".