151640431442 has 4 divisors (see below), whose sum is σ = 227460647166. Its totient is φ = 75820215720.

The previous prime is 151640431427. The next prime is 151640431447. The reversal of 151640431442 is 244134046151.

151640431442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 140041356841 + 11599074601 = 374221^2 + 107699^2 .

It is not an unprimeable number, because it can be changed into a prime (151640431447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37910107859 + ... + 37910107862.

Almost surely, 2^151640431442 is an apocalyptic number.

151640431442 is a deficient number, since it is larger than the sum of its proper divisors (75820215724).

151640431442 is an equidigital number, since it uses as much as digits as its factorization.

151640431442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75820215723.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 151640431442 its reverse (244134046151), we get a palindrome (395774477593).

The spelling of 151640431442 in words is "one hundred fifty-one billion, six hundred forty million, four hundred thirty-one thousand, four hundred forty-two".