77400400700744 has 48 divisors (see below), whose sum is σ = 159560741592000. Its totient is φ = 35172659133920.

The previous prime is 77400400700743. The next prime is 77400400700747. The reversal of 77400400700744 is 44700700400477.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 77400400700695 and 77400400700704.

It is not an unprimeable number, because it can be changed into a prime (77400400700743) 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, 6966644 + ... + 14259555.

It is an arithmetic number, because the mean of its divisors is an integer number (3324182116500).

Almost surely, 2^{77400400700744} is an apocalyptic number.

It is an amenable number.

77400400700744 is an abundant number, since it is smaller than the sum of its proper divisors (82160340891256).

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

77400400700744 is a wasteful number, since it uses less digits than its factorization.

77400400700744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21229994 (or 21229979 counting only the distinct ones).

The product of its (nonzero) digits is 614656, while the sum is 44.

Adding to 77400400700744 its reverse (44700700400477), we get a palindrome (122101101101221).

The spelling of 77400400700744 in words is "seventy-seven trillion, four hundred billion, four hundred million, seven hundred thousand, seven hundred forty-four".