261778462934 has 8 divisors (see below), whose sum is σ = 392673487008. Its totient is φ = 130887300600.

The previous prime is 261778462901. The next prime is 261778462943. The reversal of 261778462934 is 439264877162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×261778462934² (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 3 ways as a sum of consecutive naturals, for example, 789557 + ... + 1070960.

It is an arithmetic number, because the mean of its divisors is an integer number (49084185876).

Almost surely, 2^261778462934 is an apocalyptic number.

261778462934 is a deficient number, since it is larger than the sum of its proper divisors (130895024074).

261778462934 is a wasteful number, since it uses less digits than its factorization.

261778462934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930870.

The product of its digits is 24385536, while the sum is 59.

The spelling of 261778462934 in words is "two hundred sixty-one billion, seven hundred seventy-eight million, four hundred sixty-two thousand, nine hundred thirty-four".