623156649 has 8 divisors (see below), whose sum is σ = 831143520. Its totient is φ = 415303776.

The previous prime is 623156593. The next prime is 623156657. The reversal of 623156649 is 946651326.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 623156649 - 2¹³ = 623148457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 623156649.

It is not an unprimeable number, because it can be changed into a prime (623156249) 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, 22092 + ... + 41645.

It is an arithmetic number, because the mean of its divisors is an integer number (103892940).

Almost surely, 2^623156649 is an apocalyptic number.

It is an amenable number.

623156649 is a deficient number, since it is larger than the sum of its proper divisors (207986871).

623156649 is a wasteful number, since it uses less digits than its factorization.

623156649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66999.

The product of its digits is 233280, while the sum is 42.

The square root of 623156649 is about 24963.1057562956. The cubic root of 623156649 is about 854.1465893812.

The spelling of 623156649 in words is "six hundred twenty-three million, one hundred fifty-six thousand, six hundred forty-nine".