30091017640 has 32 divisors (see below), whose sum is σ = 67710994560. Its totient is φ = 12035304000.

The previous prime is 30091017629. The next prime is 30091017643. The reversal of 30091017640 is 4671019003.

It is a happy number.

It is a super-2 number, since 2×30091017640² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30091017643) 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, 515965 + ... + 571315.

It is an arithmetic number, because the mean of its divisors is an integer number (2115968580).

Almost surely, 2^30091017640 is an apocalyptic number.

It is an amenable number.

30091017640 is an abundant number, since it is smaller than the sum of its proper divisors (37619976920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30091017640 is a wasteful number, since it uses less digits than its factorization.

30091017640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68953 (or 68949 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The spelling of 30091017640 in words is "thirty billion, ninety-one million, seventeen thousand, six hundred forty".