1640376744127 has 4 divisors (see below), whose sum is σ = 1789501902696. Its totient is φ = 1491251585560.

The previous prime is 1640376744107. The next prime is 1640376744137. The reversal of 1640376744127 is 7214476730461.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1640376744127 - 2³⁵ = 1606017005759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640376744107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74562579268 + ... + 74562579289.

It is an arithmetic number, because the mean of its divisors is an integer number (447375475674).

Almost surely, 2^{1640376744127} is an apocalyptic number.

1640376744127 is a deficient number, since it is larger than the sum of its proper divisors (149125158569).

1640376744127 is a wasteful number, since it uses less digits than its factorization.

1640376744127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149125158568.

The product of its (nonzero) digits is 4741632, while the sum is 52.

The spelling of 1640376744127 in words is "one trillion, six hundred forty billion, three hundred seventy-six million, seven hundred forty-four thousand, one hundred twenty-seven".