33740387481 has 16 divisors (see below), whose sum is σ = 45171833024. Its totient is φ = 22401347904.

The previous prime is 33740387477. The next prime is 33740387489. The reversal of 33740387481 is 18478304733.

It is not a de Polignac number, because 33740387481 - 2² = 33740387477 is a prime.

It is a super-2 number, since 2×33740387481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33740387481.

It is not an unprimeable number, because it can be changed into a prime (33740387489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1896630 + ... + 1914336.

It is an arithmetic number, because the mean of its divisors is an integer number (2823239564).

Almost surely, 2^33740387481 is an apocalyptic number.

It is an amenable number.

33740387481 is a deficient number, since it is larger than the sum of its proper divisors (11431445543).

33740387481 is a wasteful number, since it uses less digits than its factorization.

33740387481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20280.

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 33740387481 in words is "thirty-three billion, seven hundred forty million, three hundred eighty-seven thousand, four hundred eighty-one".