77974138309 has 8 divisors (see below), whose sum is σ = 78203073312. Its totient is φ = 77745489360.

The previous prime is 77974138301. The next prime is 77974138331. The reversal of 77974138309 is 90383147977.

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

It is a cyclic number.

It is not a de Polignac number, because 77974138309 - 2³ = 77974138301 is a prime.

It is a super-2 number, since 2×77974138309² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77974138301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480687 + ... + 622099.

It is an arithmetic number, because the mean of its divisors is an integer number (9775384164).

Almost surely, 2^77974138309 is an apocalyptic number.

It is an amenable number.

77974138309 is a deficient number, since it is larger than the sum of its proper divisors (228935003).

77974138309 is a wasteful number, since it uses less digits than its factorization.

77974138309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143027.

The product of its (nonzero) digits is 8001504, while the sum is 58.

The spelling of 77974138309 in words is "seventy-seven billion, nine hundred seventy-four million, one hundred thirty-eight thousand, three hundred nine".