7149851906 has 8 divisors (see below), whose sum is σ = 10793089020. Its totient is φ = 3552155568.

The previous prime is 7149851851. The next prime is 7149851911. The reversal of 7149851906 is 6091589417.

It can be written as a sum of positive squares in 2 ways, for example, as 6262348225 + 887503681 = 79135^2 + 29791^2 .

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

It is a super-2 number, since 2×7149851906² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11384801 + ... + 11385428.

Almost surely, 2^7149851906 is an apocalyptic number.

7149851906 is a deficient number, since it is larger than the sum of its proper divisors (3643237114).

7149851906 is a wasteful number, since it uses less digits than its factorization.

7149851906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22770388.

The product of its (nonzero) digits is 544320, while the sum is 50.

The square root of 7149851906 is about 84556.7969237246. The cubic root of 7149851906 is about 1926.4852230257.

The spelling of 7149851906 in words is "seven billion, one hundred forty-nine million, eight hundred fifty-one thousand, nine hundred six".