74730378531 has 16 divisors (see below), whose sum is σ = 100536172704. Its totient is φ = 49374388224.

The previous prime is 74730378451. The next prime is 74730378533. The reversal of 74730378531 is 13587303747.

It is a happy number.

It is not a de Polignac number, because 74730378531 - 2¹⁵ = 74730345763 is a prime.

It is a super-2 number, since 2×74730378531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74730378533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94120 + ... + 397893.

It is an arithmetic number, because the mean of its divisors is an integer number (6283510794).

Almost surely, 2^74730378531 is an apocalyptic number.

74730378531 is a deficient number, since it is larger than the sum of its proper divisors (25805794173).

74730378531 is a wasteful number, since it uses less digits than its factorization.

74730378531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492470.

The product of its (nonzero) digits is 1481760, while the sum is 48.

The spelling of 74730378531 in words is "seventy-four billion, seven hundred thirty million, three hundred seventy-eight thousand, five hundred thirty-one".