45121639418 has 4 divisors (see below), whose sum is σ = 67682459130. Its totient is φ = 22560819708.

The previous prime is 45121639399. The next prime is 45121639439. The reversal of 45121639418 is 81493612154.

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., 44294674369 + 826965049 = 210463^2 + 28757^2 .

It is a super-2 number, since 2×45121639418² (a number of 22 digits) contains 22 as substring.

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, 11280409853 + ... + 11280409856.

Almost surely, 2^45121639418 is an apocalyptic number.

45121639418 is a deficient number, since it is larger than the sum of its proper divisors (22560819712).

45121639418 is a wasteful number, since it uses less digits than its factorization.

45121639418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22560819711.

The product of its digits is 207360, while the sum is 44.

The spelling of 45121639418 in words is "forty-five billion, one hundred twenty-one million, six hundred thirty-nine thousand, four hundred eighteen".