137781263730 has 96 divisors (see below), whose sum is σ = 363766116672. Its totient is φ = 33374239360.

The previous prime is 137781263717. The next prime is 137781263761. The reversal of 137781263730 is 37362187731.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 137781263730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4620649 + ... + 4650371.

It is an arithmetic number, because the mean of its divisors is an integer number (3789230382).

Almost surely, 2^137781263730 is an apocalyptic number.

137781263730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 137781263730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181883058336).

137781263730 is an abundant number, since it is smaller than the sum of its proper divisors (225984852942).

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

137781263730 is a wasteful number, since it uses less digits than its factorization.

137781263730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31032 (or 31021 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 48.

The spelling of 137781263730 in words is "one hundred thirty-seven billion, seven hundred eighty-one million, two hundred sixty-three thousand, seven hundred thirty".