137721247266 has 16 divisors (see below), whose sum is σ = 276161670144. Its totient is φ = 45787219824.

The previous prime is 137721247253. The next prime is 137721247271. The reversal of 137721247266 is 662742127731.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29963161 + ... + 29967756.

It is an arithmetic number, because the mean of its divisors is an integer number (17260104384).

Almost surely, 2^137721247266 is an apocalyptic number.

137721247266 is an abundant number, since it is smaller than the sum of its proper divisors (138440422878).

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

137721247266 is a wasteful number, since it uses less digits than its factorization.

137721247266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59931305.

The product of its digits is 1185408, while the sum is 48.

The spelling of 137721247266 in words is "one hundred thirty-seven billion, seven hundred twenty-one million, two hundred forty-seven thousand, two hundred sixty-six".