771811623042 has 16 divisors (see below), whose sum is σ = 1596851634240. Its totient is φ = 248399142992.

The previous prime is 771811623041. The next prime is 771811623133. The reversal of 771811623042 is 240326118177.

It is a junction number, because it is equal to n+sod(n) for n = 771811622985 and 771811623003.

It is not an unprimeable number, because it can be changed into a prime (771811623041) 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, 2217849318 + ... + 2217849665.

It is an arithmetic number, because the mean of its divisors is an integer number (99803227140).

Almost surely, 2^771811623042 is an apocalyptic number.

771811623042 is an abundant number, since it is smaller than the sum of its proper divisors (825040011198).

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

771811623042 is a wasteful number, since it uses less digits than its factorization.

771811623042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4435699017.

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 771811623042 in words is "seven hundred seventy-one billion, eight hundred eleven million, six hundred twenty-three thousand, forty-two".