151216634621 has 8 divisors (see below), whose sum is σ = 163559816280. Its totient is φ = 138975043392.

The previous prime is 151216634609. The next prime is 151216634629. The reversal of 151216634621 is 126436612151.

It can be written as a sum of positive squares in 4 ways, for example, as 20596555225 + 130620079396 = 143515^2 + 361414^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 151216634621 - 2¹⁰ = 151216633597 is a prime.

It is a super-2 number, since 2×151216634621² (a number of 23 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 (151216634629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25394510 + ... + 25400463.

It is an arithmetic number, because the mean of its divisors is an integer number (20444977035).

Almost surely, 2^151216634621 is an apocalyptic number.

It is an amenable number.

151216634621 is a deficient number, since it is larger than the sum of its proper divisors (12343181659).

151216634621 is a wasteful number, since it uses less digits than its factorization.

151216634621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50795215.

The product of its digits is 51840, while the sum is 38.

The spelling of 151216634621 in words is "one hundred fifty-one billion, two hundred sixteen million, six hundred thirty-four thousand, six hundred twenty-one".