261788981015374 has 16 divisors (see below), whose sum is σ = 394314688110816. Its totient is φ = 130350756672000.

The previous prime is 261788981015351. The next prime is 261788981015431. The reversal of 261788981015374 is 473510189887162.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113964879 + ... + 116239285.

It is an arithmetic number, because the mean of its divisors is an integer number (24644668006926).

It is a 1-persistent number, because it is pandigital, but 2⋅261788981015374 = 523577962030748 is not.

Almost surely, 2^{261788981015374} is an apocalyptic number.

261788981015374 is a deficient number, since it is larger than the sum of its proper divisors (132525707095442).

261788981015374 is a wasteful number, since it uses less digits than its factorization.

261788981015374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513451.

The product of its (nonzero) digits is 162570240, while the sum is 70.

The spelling of 261788981015374 in words is "two hundred sixty-one trillion, seven hundred eighty-eight billion, nine hundred eighty-one million, fifteen thousand, three hundred seventy-four".