136878224085454 has 4 divisors (see below), whose sum is σ = 205317336128184. Its totient is φ = 68439112042726.

The previous prime is 136878224085439. The next prime is 136878224085469. The reversal of 136878224085454 is 454580422878631.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (136878224085439) and next prime (136878224085469).

It is a super-2 number, since 2×136878224085454² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 136878224085454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34219556021362 + ... + 34219556021365.

It is an arithmetic number, because the mean of its divisors is an integer number (51329334032046).

Almost surely, 2^{136878224085454} is an apocalyptic number.

136878224085454 is a deficient number, since it is larger than the sum of its proper divisors (68439112042730).

136878224085454 is an equidigital number, since it uses as much as digits as its factorization.

136878224085454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68439112042729.

The product of its (nonzero) digits is 412876800, while the sum is 67.

The spelling of 136878224085454 in words is "one hundred thirty-six trillion, eight hundred seventy-eight billion, two hundred twenty-four million, eighty-five thousand, four hundred fifty-four".