623742645 has 16 divisors (see below), whose sum is σ = 1001246400. Its totient is φ = 331576704.

The previous prime is 623742641. The next prime is 623742667. The reversal of 623742645 is 546247326.

It is not a de Polignac number, because 623742645 - 2² = 623742641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623742641) 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, 63120 + ... + 72329.

It is an arithmetic number, because the mean of its divisors is an integer number (62577900).

Almost surely, 2^623742645 is an apocalyptic number.

It is an amenable number.

623742645 is a deficient number, since it is larger than the sum of its proper divisors (377503755).

623742645 is a wasteful number, since it uses less digits than its factorization.

623742645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135764.

The product of its digits is 241920, while the sum is 39.

The square root of 623742645 is about 24974.8402397293. The cubic root of 623742645 is about 854.4142426134.

The spelling of 623742645 in words is "six hundred twenty-three million, seven hundred forty-two thousand, six hundred forty-five".