77420387340742 has 8 divisors (see below), whose sum is σ = 118963034206632. Its totient is φ = 37766042605200.

The previous prime is 77420387340727. The next prime is 77420387340749. The reversal of 77420387340742 is 24704378302477.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×77420387340742² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77420387340749) 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, 472075532484 + ... + 472075532647.

It is an arithmetic number, because the mean of its divisors is an integer number (14870379275829).

Almost surely, 2^{77420387340742} is an apocalyptic number.

77420387340742 is a deficient number, since it is larger than the sum of its proper divisors (41542646865890).

77420387340742 is a wasteful number, since it uses less digits than its factorization.

77420387340742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944151065174.

The product of its (nonzero) digits is 44255232, while the sum is 58.

The spelling of 77420387340742 in words is "seventy-seven trillion, four hundred twenty billion, three hundred eighty-seven million, three hundred forty thousand, seven hundred forty-two".