5391061778 has 16 divisors (see below), whose sum is σ = 8368306560. Its totient is φ = 2601690000.

The previous prime is 5391061771. The next prime is 5391061813. The reversal of 5391061778 is 8771601935.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5391061771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174263 + ... + 202853.

It is an arithmetic number, because the mean of its divisors is an integer number (523019160).

Almost surely, 2^5391061778 is an apocalyptic number.

5391061778 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

5391061778 is a deficient number, since it is larger than the sum of its proper divisors (2977244782).

5391061778 is a wasteful number, since it uses less digits than its factorization.

5391061778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31873.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 5391061778 is about 73423.8501986923. The cubic root of 5391061778 is about 1753.4421261493.

The spelling of 5391061778 in words is "five billion, three hundred ninety-one million, sixty-one thousand, seven hundred seventy-eight".