10077211781 has 16 divisors (see below), whose sum is σ = 12572630784. Its totient is φ = 7863951744.

The previous prime is 10077211777. The next prime is 10077211787. The reversal of 10077211781 is 18711277001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10077211781 - 2² = 10077211777 is a prime.

It is a super-2 number, since 2×10077211781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10077211787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 751841 + ... + 765126.

It is an arithmetic number, because the mean of its divisors is an integer number (785789424).

Almost surely, 2^10077211781 is an apocalyptic number.

It is an amenable number.

10077211781 is a deficient number, since it is larger than the sum of its proper divisors (2495419003).

10077211781 is a wasteful number, since it uses less digits than its factorization.

10077211781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517060.

The product of its (nonzero) digits is 5488, while the sum is 35.

Adding to 10077211781 its reverse (18711277001), we get a palindrome (28788488782).

The spelling of 10077211781 in words is "ten billion, seventy-seven million, two hundred eleven thousand, seven hundred eighty-one".