2698544778 has 16 divisors (see below), whose sum is σ = 5409115200. Its totient is φ = 897510656.

The previous prime is 2698544741. The next prime is 2698544789. The reversal of 2698544778 is 8774458962.

It is a happy 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, 498150 + ... + 503537.

It is an arithmetic number, because the mean of its divisors is an integer number (338069700).

Almost surely, 2^2698544778 is an apocalyptic number.

2698544778 is an abundant number, since it is smaller than the sum of its proper divisors (2710570422).

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

2698544778 is a wasteful number, since it uses less digits than its factorization.

2698544778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002141.

The product of its digits is 27095040, while the sum is 60.

The square root of 2698544778 is about 51947.5194595469. The cubic root of 2698544778 is about 1392.2264368968.

The spelling of 2698544778 in words is "two billion, six hundred ninety-eight million, five hundred forty-four thousand, seven hundred seventy-eight".