77403401007 has 24 divisors (see below), whose sum is σ = 107119997712. Its totient is φ = 49710240000.

The previous prime is 77403400979. The next prime is 77403401021. The reversal of 77403401007 is 70010430477.

It is not a de Polignac number, because 77403401007 - 2¹¹ = 77403398959 is a prime.

It is a super-2 number, since 2×77403401007² (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 (77403401027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321507 + ... + 508107.

It is an arithmetic number, because the mean of its divisors is an integer number (4463333238).

Almost surely, 2^77403401007 is an apocalyptic number.

77403401007 is a deficient number, since it is larger than the sum of its proper divisors (29716596705).

77403401007 is a wasteful number, since it uses less digits than its factorization.

77403401007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186779 (or 186742 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 33.

The spelling of 77403401007 in words is "seventy-seven billion, four hundred three million, four hundred one thousand, seven".