151637661 has 12 divisors (see below), whose sum is σ = 250322592. Its totient is φ = 86650056.

The previous prime is 151637659. The next prime is 151637669. The reversal of 151637661 is 166736151.

151637661 is a `hidden beast` number, since 15 + 1 + 637 + 6 + 6 + 1 = 666.

151637661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 151637661 - 2¹ = 151637659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151637669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1203411 + ... + 1203536.

It is an arithmetic number, because the mean of its divisors is an integer number (20860216).

Almost surely, 2^151637661 is an apocalyptic number.

It is an amenable number.

151637661 is a deficient number, since it is larger than the sum of its proper divisors (98684931).

151637661 is a wasteful number, since it uses less digits than its factorization.

151637661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406960 (or 2406957 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 151637661 is about 12314.1244512145. The cubic root of 151637661 is about 533.2559283063.

The spelling of 151637661 in words is "one hundred fifty-one million, six hundred thirty-seven thousand, six hundred sixty-one".