151561423618 has 32 divisors (see below), whose sum is σ = 248875934400. Its totient is φ = 68651304960.

The previous prime is 151561423613. The next prime is 151561423661. The reversal of 151561423618 is 816324165151.

It is a happy number.

It is a super-2 number, since 2×151561423618² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (151561423613) 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, 8159830 + ... + 8178382.

It is an arithmetic number, because the mean of its divisors is an integer number (7777372950).

Almost surely, 2^151561423618 is an apocalyptic number.

151561423618 is a deficient number, since it is larger than the sum of its proper divisors (97314510782).

151561423618 is a wasteful number, since it uses less digits than its factorization.

151561423618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19842.

The product of its digits is 172800, while the sum is 43.

Adding to 151561423618 its reverse (816324165151), we get a palindrome (967885588769).

The spelling of 151561423618 in words is "one hundred fifty-one billion, five hundred sixty-one million, four hundred twenty-three thousand, six hundred eighteen".