542621612002451 has 16 divisors (see below), whose sum is σ = 560942697665280. Its totient is φ = 524351867783040.

The previous prime is 542621612002447. The next prime is 542621612002471. The reversal of 542621612002451 is 154200216126245.

It is a cyclic number.

It is not a de Polignac number, because 542621612002451 - 2² = 542621612002447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 542621612002399 and 542621612002408.

It is not an unprimeable number, because it can be changed into a prime (542621612002471) 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, 119049725 + ... + 123523601.

It is an arithmetic number, because the mean of its divisors is an integer number (35058918604080).

Almost surely, 2^{542621612002451} is an apocalyptic number.

542621612002451 is a deficient number, since it is larger than the sum of its proper divisors (18321085662829).

542621612002451 is a wasteful number, since it uses less digits than its factorization.

542621612002451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4479614.

The product of its (nonzero) digits is 230400, while the sum is 41.

Adding to 542621612002451 its reverse (154200216126245), we get a palindrome (696821828128696).

The spelling of 542621612002451 in words is "five hundred forty-two trillion, six hundred twenty-one billion, six hundred twelve million, two thousand, four hundred fifty-one".