136378641 has 32 divisors (see below), whose sum is σ = 227155968. Its totient is φ = 70974720.

The previous prime is 136378639. The next prime is 136378643. The reversal of 136378641 is 146873631.

It is an interprime number because it is at equal distance from previous prime (136378639) and next prime (136378643).

It is not a de Polignac number, because 136378641 - 2¹ = 136378639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136378641.

It is not an unprimeable number, because it can be changed into a prime (136378643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4906 + ... + 17228.

It is an arithmetic number, because the mean of its divisors is an integer number (7098624).

Almost surely, 2^136378641 is an apocalyptic number.

It is an amenable number.

136378641 is a deficient number, since it is larger than the sum of its proper divisors (90777327).

136378641 is a wasteful number, since it uses less digits than its factorization.

136378641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12381.

The product of its digits is 72576, while the sum is 39.

The square root of 136378641 is about 11678.1266048969. The cubic root of 136378641 is about 514.7331271969.

The spelling of 136378641 in words is "one hundred thirty-six million, three hundred seventy-eight thousand, six hundred forty-one".