781012055 has 16 divisors (see below), whose sum is σ = 944891904. Its totient is φ = 619708320.

The previous prime is 781012033. The next prime is 781012103. The reversal of 781012055 is 550210187.

It is not a de Polignac number, because 781012055 - 2¹⁴ = 780995671 is a prime.

It is a Duffinian number.

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, 787610 + ... + 788600.

It is an arithmetic number, because the mean of its divisors is an integer number (59055744).

Almost surely, 2^781012055 is an apocalyptic number.

781012055 is a deficient number, since it is larger than the sum of its proper divisors (163879849).

781012055 is a wasteful number, since it uses less digits than its factorization.

781012055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 781012055 is about 27946.5929050394. The cubic root of 781012055 is about 920.9143614990.

The spelling of 781012055 in words is "seven hundred eighty-one million, twelve thousand, fifty-five".