3734640798640 has 80 divisors (see below), whose sum is σ = 8794857628800. Its totient is φ = 1474627055616.

The previous prime is 3734640798593. The next prime is 3734640798643. The reversal of 3734640798640 is 468970464373.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (3734640798643) 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, 30230116 + ... + 30353404.

It is an arithmetic number, because the mean of its divisors is an integer number (109935720360).

Almost surely, 2^{3734640798640} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3734640798640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4397428814400).

3734640798640 is an abundant number, since it is smaller than the sum of its proper divisors (5060216830160).

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

3734640798640 is a wasteful number, since it uses less digits than its factorization.

3734640798640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128174 (or 128168 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 61.

The spelling of 3734640798640 in words is "three trillion, seven hundred thirty-four billion, six hundred forty million, seven hundred ninety-eight thousand, six hundred forty".