74778630131 has 8 divisors (see below), whose sum is σ = 76055400960. Its totient is φ = 73502170632.

The previous prime is 74778630127. The next prime is 74778630139. The reversal of 74778630131 is 13103687747.

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 74778630131 - 2² = 74778630127 is a prime.

It is a super-2 number, since 2×74778630131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74778630139) 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, 435266 + ... + 582248.

It is an arithmetic number, because the mean of its divisors is an integer number (9506925120).

Almost surely, 2^74778630131 is an apocalyptic number.

74778630131 is a deficient number, since it is larger than the sum of its proper divisors (1276770829).

74778630131 is a wasteful number, since it uses less digits than its factorization.

74778630131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155665.

The product of its (nonzero) digits is 592704, while the sum is 47.

The spelling of 74778630131 in words is "seventy-four billion, seven hundred seventy-eight million, six hundred thirty thousand, one hundred thirty-one".