38647319640 has 64 divisors (see below), whose sum is σ = 115971372000. Its totient is φ = 10303337472.

The previous prime is 38647319611. The next prime is 38647319651. The reversal of 38647319640 is 4691374683.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459586 + ... + 537134.

Almost surely, 2^38647319640 is an apocalyptic number.

38647319640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38647319640 is an abundant number, since it is smaller than the sum of its proper divisors (77324052360).

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

38647319640 is a wasteful number, since it uses less digits than its factorization.

38647319640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81716 (or 81712 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 51.

The spelling of 38647319640 in words is "thirty-eight billion, six hundred forty-seven million, three hundred nineteen thousand, six hundred forty".