1251504545454 has 64 divisors (see below), whose sum is σ = 2788909056000. Its totient is φ = 416001083904.

The previous prime is 1251504545449. The next prime is 1251504545471. The reversal of 1251504545454 is 4545454051521.

1251504545454 is a `hidden beast` number, since 1 + 2 + 5 + 1 + 50 + 4 + 54 + 545 + 4 = 666.

It is a super-2 number, since 2×1251504545454² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45253459 + ... + 45281105.

It is an arithmetic number, because the mean of its divisors is an integer number (43576704000).

Almost surely, 2^{1251504545454} is an apocalyptic number.

1251504545454 is an abundant number, since it is smaller than the sum of its proper divisors (1537404510546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251504545454 is a wasteful number, since it uses less digits than its factorization.

1251504545454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29974 (or 29968 counting only the distinct ones).

The product of its (nonzero) digits is 1600000, while the sum is 45.

Adding to 1251504545454 its reverse (4545454051521), we get a palindrome (5796958596975).

The spelling of 1251504545454 in words is "one trillion, two hundred fifty-one billion, five hundred four million, five hundred forty-five thousand, four hundred fifty-four".