77403218997 has 12 divisors (see below), whose sum is σ = 111753760704. Its totient is φ = 47632749840.

The previous prime is 77403218987. The next prime is 77403219029. The reversal of 77403218997 is 79981230477.

It is not a de Polignac number, because 77403218997 - 2⁶ = 77403218933 is a prime.

It is a super-2 number, since 2×77403218997² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77403218927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76334029 + ... + 76335042.

It is an arithmetic number, because the mean of its divisors is an integer number (9312813392).

Almost surely, 2^77403218997 is an apocalyptic number.

It is an amenable number.

77403218997 is a deficient number, since it is larger than the sum of its proper divisors (34350541707).

77403218997 is a wasteful number, since it uses less digits than its factorization.

77403218997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152669100 (or 152669087 counting only the distinct ones).

The product of its (nonzero) digits is 5334336, while the sum is 57.

The spelling of 77403218997 in words is "seventy-seven billion, four hundred three million, two hundred eighteen thousand, nine hundred ninety-seven".