261451534107426 has 32 divisors (see below), whose sum is σ = 569911036363200. Its totient is φ = 79477389420864.

The previous prime is 261451534107409. The next prime is 261451534107461. The reversal of 261451534107426 is 624701435154162.

It is a happy number.

261451534107426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 20192419701 + ... + 20192432648.

It is an arithmetic number, because the mean of its divisors is an integer number (17809719886350).

Almost surely, 2^{261451534107426} is an apocalyptic number.

261451534107426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

261451534107426 is an abundant number, since it is smaller than the sum of its proper divisors (308459502255774).

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

261451534107426 is a wasteful number, since it uses less digits than its factorization.

261451534107426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40384852450.

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 261451534107426 in words is "two hundred sixty-one trillion, four hundred fifty-one billion, five hundred thirty-four million, one hundred seven thousand, four hundred twenty-six".