154071472493 has 2 divisors, whose sum is σ = 154071472494. Its totient is φ = 154071472492.

The previous prime is 154071472463. The next prime is 154071472519. The reversal of 154071472493 is 394274170451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152898204484 + 1173268009 = 391022^2 + 34253^2 .

It is a cyclic number.

It is not a de Polignac number, because 154071472493 - 2²⁰ = 154070423917 is a prime.

It is a super-2 number, since 2×154071472493² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154071472453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77035736246 + 77035736247.

It is an arithmetic number, because the mean of its divisors is an integer number (77035736247).

Almost surely, 2^154071472493 is an apocalyptic number.

It is an amenable number.

154071472493 is a deficient number, since it is larger than the sum of its proper divisors (1).

154071472493 is an equidigital number, since it uses as much as digits as its factorization.

154071472493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 154071472493 in words is "one hundred fifty-four billion, seventy-one million, four hundred seventy-two thousand, four hundred ninety-three".