137781017898 has 8 divisors (see below), whose sum is σ = 275562035808. Its totient is φ = 45927005964.

The previous prime is 137781017879. The next prime is 137781017909. The reversal of 137781017898 is 898710187731.

It is a sphenic number, since it is the product of 3 distinct primes.

137781017898 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11481751486 + ... + 11481751497.

It is an arithmetic number, because the mean of its divisors is an integer number (34445254476).

Almost surely, 2^137781017898 is an apocalyptic number.

137781017898 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

137781017898 is a wasteful number, since it uses less digits than its factorization.

137781017898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22963502988.

The product of its (nonzero) digits is 4741632, while the sum is 60.

The spelling of 137781017898 in words is "one hundred thirty-seven billion, seven hundred eighty-one million, seventeen thousand, eight hundred ninety-eight".