261078578934 has 32 divisors (see below), whose sum is σ = 526470782976. Its totient is φ = 86307782400.

The previous prime is 261078578927. The next prime is 261078578947. The reversal of 261078578934 is 439875870162.

It is a super-3 number, since 3×261078578934³ (a number of 35 digits) contains 333 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, 1960159 + ... + 2089109.

It is an arithmetic number, because the mean of its divisors is an integer number (16452211968).

It is a 1-persistent number, because it is pandigital, but 2⋅261078578934 = 522157157868 is not.

Almost surely, 2^261078578934 is an apocalyptic number.

261078578934 is an abundant number, since it is smaller than the sum of its proper divisors (265392204042).

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

261078578934 is a wasteful number, since it uses less digits than its factorization.

261078578934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131740.

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 261078578934 in words is "two hundred sixty-one billion, seventy-eight million, five hundred seventy-eight thousand, nine hundred thirty-four".