155640622 has 16 divisors (see below), whose sum is σ = 243865440. Its totient is φ = 74404512.

The previous prime is 155640613. The next prime is 155640689. The reversal of 155640622 is 226046551.

155640622 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7053 + ... + 19000.

It is an arithmetic number, because the mean of its divisors is an integer number (15241590).

Almost surely, 2^155640622 is an apocalyptic number.

155640622 is a deficient number, since it is larger than the sum of its proper divisors (88224818).

155640622 is a wasteful number, since it uses less digits than its factorization.

155640622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26187.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 155640622 is about 12475.6010676841. The cubic root of 155640622 is about 537.9075655516.

The spelling of 155640622 in words is "one hundred fifty-five million, six hundred forty thousand, six hundred twenty-two".