771638043 has 8 divisors (see below), whose sum is σ = 1122382656. Its totient is φ = 467659400.

The previous prime is 771638039. The next prime is 771638111. The reversal of 771638043 is 340836177.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 771638043 - 2² = 771638039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 771637992 and 771638010.

It is not an unprimeable number, because it can be changed into a prime (771638243) 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, 11691453 + ... + 11691518.

It is an arithmetic number, because the mean of its divisors is an integer number (140297832).

Almost surely, 2^771638043 is an apocalyptic number.

771638043 is a deficient number, since it is larger than the sum of its proper divisors (350744613).

771638043 is a wasteful number, since it uses less digits than its factorization.

771638043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23382985.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 771638043 is about 27778.3736564976. The cubic root of 771638043 is about 917.2151305228.

The spelling of 771638043 in words is "seven hundred seventy-one million, six hundred thirty-eight thousand, forty-three".