99454757492621 has 2 divisors, whose sum is σ = 99454757492622. Its totient is φ = 99454757492620.

The previous prime is 99454757492599. The next prime is 99454757492737. The reversal of 99454757492621 is 12629475745499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97047028050025 + 2407729442596 = 9851245^2 + 1551686^2 .

It is a cyclic number.

It is not a de Polignac number, because 99454757492621 - 2⁶ = 99454757492557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99454747492621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49727378746310 + 49727378746311.

It is an arithmetic number, because the mean of its divisors is an integer number (49727378746311).

Almost surely, 2^{99454757492621} is an apocalyptic number.

It is an amenable number.

99454757492621 is a deficient number, since it is larger than the sum of its proper divisors (1).

99454757492621 is an equidigital number, since it uses as much as digits as its factorization.

99454757492621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1371686400, while the sum is 74.

The spelling of 99454757492621 in words is "ninety-nine trillion, four hundred fifty-four billion, seven hundred fifty-seven million, four hundred ninety-two thousand, six hundred twenty-one".