15415420154 has 4 divisors (see below), whose sum is σ = 23123130234. Its totient is φ = 7707710076.

The previous prime is 15415420121. The next prime is 15415420169. The reversal of 15415420154 is 45102451451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45102451451 = 127 ⋅355137413.

It can be written as a sum of positive squares in only one way, i.e., 14581770025 + 833650129 = 120755^2 + 28873^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 15415420154.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3853855037 + ... + 3853855040.

Almost surely, 2^15415420154 is an apocalyptic number.

15415420154 is a deficient number, since it is larger than the sum of its proper divisors (7707710080).

15415420154 is an equidigital number, since it uses as much as digits as its factorization.

15415420154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7707710079.

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 15415420154 in words is "fifteen billion, four hundred fifteen million, four hundred twenty thousand, one hundred fifty-four".