77631011 has 4 divisors (see below), whose sum is σ = 77650392. Its totient is φ = 77611632.

The previous prime is 77631007. The next prime is 77631019. The reversal of 77631011 is 11013677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11013677 = 233 ⋅47269.

It is a cyclic number.

It is not a de Polignac number, because 77631011 - 2² = 77631007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77631019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1205 + ... + 12518.

It is an arithmetic number, because the mean of its divisors is an integer number (19412598).

Almost surely, 2^77631011 is an apocalyptic number.

77631011 is a deficient number, since it is larger than the sum of its proper divisors (19381).

77631011 is a wasteful number, since it uses less digits than its factorization.

77631011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19380.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 77631011 is about 8810.8462136165. The cubic root of 77631011 is about 426.5910576336.

Adding to 77631011 its reverse (11013677), we get a palindrome (88644688).

The spelling of 77631011 in words is "seventy-seven million, six hundred thirty-one thousand, eleven".