30291196781 has 8 divisors (see below), whose sum is σ = 30514397760. Its totient is φ = 30068071488.

The previous prime is 30291196729. The next prime is 30291196799. The reversal of 30291196781 is 18769119203.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30291196781 is a prime.

It is a super-2 number, since 2×30291196781² (a number of 22 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 (30291196711) 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, 975365 + ... + 1005941.

It is an arithmetic number, because the mean of its divisors is an integer number (3814299720).

Almost surely, 2^30291196781 is an apocalyptic number.

It is an amenable number.

30291196781 is a deficient number, since it is larger than the sum of its proper divisors (223200979).

30291196781 is a wasteful number, since it uses less digits than its factorization.

30291196781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37843.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 30291196781 in words is "thirty billion, two hundred ninety-one million, one hundred ninety-six thousand, seven hundred eighty-one".