771538494 has 16 divisors (see below), whose sum is σ = 1545935760. Its totient is φ = 256703040.

The previous prime is 771538487. The next prime is 771538499. The reversal of 771538494 is 494835177.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771538499) 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, 115599 + ... + 122090.

It is an arithmetic number, because the mean of its divisors is an integer number (96620985).

Almost surely, 2^771538494 is an apocalyptic number.

771538494 is an abundant number, since it is smaller than the sum of its proper divisors (774397266).

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

771538494 is a wasteful number, since it uses less digits than its factorization.

771538494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238235.

The product of its digits is 846720, while the sum is 48.

The square root of 771538494 is about 27776.5817551404. The cubic root of 771538494 is about 917.1756855280.

The spelling of 771538494 in words is "seven hundred seventy-one million, five hundred thirty-eight thousand, four hundred ninety-four".