642370155643742 has 16 divisors (see below), whose sum is σ = 997126541681760. Its totient is φ = 310002314320608.

The previous prime is 642370155643639. The next prime is 642370155643747. The reversal of 642370155643742 is 247346551073246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642370155643747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1917973793 + ... + 1918308684.

It is an arithmetic number, because the mean of its divisors is an integer number (62320408855110).

Almost surely, 2^{642370155643742} is an apocalyptic number.

642370155643742 is a deficient number, since it is larger than the sum of its proper divisors (354756386038018).

642370155643742 is a wasteful number, since it uses less digits than its factorization.

642370155643742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3836285395.

The product of its (nonzero) digits is 101606400, while the sum is 59.

The spelling of 642370155643742 in words is "six hundred forty-two trillion, three hundred seventy billion, one hundred fifty-five million, six hundred forty-three thousand, seven hundred forty-two".