2147151908781 has 36 divisors (see below), whose sum is σ = 3570836424480. Its totient is φ = 1232814472560.

The previous prime is 2147151908777. The next prime is 2147151908789. The reversal of 2147151908781 is 1878091517412.

It is a happy number.

2147151908781 is a `hidden beast` number, since 2 + 1 + 47 + 1 + 519 + 0 + 8 + 7 + 81 = 666.

It is not a de Polignac number, because 2147151908781 - 2² = 2147151908777 is a prime.

It is a super-2 number, since 2×2147151908781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147151908789) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30003601 + ... + 30075078.

It is an arithmetic number, because the mean of its divisors is an integer number (99189900680).

Almost surely, 2^{2147151908781} is an apocalyptic number.

It is an amenable number.

2147151908781 is a deficient number, since it is larger than the sum of its proper divisors (1423684515699).

2147151908781 is a wasteful number, since it uses less digits than its factorization.

2147151908781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60078734 (or 60078712 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 54.

The spelling of 2147151908781 in words is "two trillion, one hundred forty-seven billion, one hundred fifty-one million, nine hundred eight thousand, seven hundred eighty-one".