742621427130645 has 40 divisors (see below), whose sum is σ = 1389096698495616. Its totient is φ = 378844554125664.

The previous prime is 742621427130643. The next prime is 742621427130647. The reversal of 742621427130645 is 546031724126247.

742621427130645 is a `hidden beast` number, since 7 + 4 + 2 + 6 + 21 + 4 + 271 + 306 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (742621427130643) and next prime (742621427130647).

It is not a de Polignac number, because 742621427130645 - 2¹ = 742621427130643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 742621427130591 and 742621427130600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742621427130643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 39861580977 + ... + 39861599606.

Almost surely, 2^{742621427130645} is an apocalyptic number.

It is an amenable number.

742621427130645 is a deficient number, since it is larger than the sum of its proper divisors (646475271364971).

742621427130645 is a wasteful number, since it uses less digits than its factorization.

742621427130645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79723180623 (or 79723180614 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 54.

The spelling of 742621427130645 in words is "seven hundred forty-two trillion, six hundred twenty-one billion, four hundred twenty-seven million, one hundred thirty thousand, six hundred forty-five".