151605477821 has 16 divisors (see below), whose sum is σ = 177543932160. Its totient is φ = 126739105920.

The previous prime is 151605477817. The next prime is 151605477833. The reversal of 151605477821 is 128774506151.

It is not a de Polignac number, because 151605477821 - 2² = 151605477817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151605477851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 872975 + ... + 1032131.

It is an arithmetic number, because the mean of its divisors is an integer number (11096495760).

Almost surely, 2^151605477821 is an apocalyptic number.

It is an amenable number.

151605477821 is a deficient number, since it is larger than the sum of its proper divisors (25938454339).

151605477821 is a wasteful number, since it uses less digits than its factorization.

151605477821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162524.

The product of its (nonzero) digits is 470400, while the sum is 47.

The spelling of 151605477821 in words is "one hundred fifty-one billion, six hundred five million, four hundred seventy-seven thousand, eight hundred twenty-one".