155415042142522 has 8 divisors (see below), whose sum is σ = 233122686908436. Its totient is φ = 77707479839712.

The previous prime is 155415042142519. The next prime is 155415042142537. The reversal of 155415042142522 is 225241240514551.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 153965139576361 + 1449902566161 = 12408269^2 + 1204119^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15666483 + ... + 23585350.

Almost surely, 2^{155415042142522} is an apocalyptic number.

155415042142522 is a deficient number, since it is larger than the sum of its proper divisors (77707644765914).

155415042142522 is a wasteful number, since it uses less digits than its factorization.

155415042142522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41231552.

The product of its (nonzero) digits is 640000, while the sum is 43.

The spelling of 155415042142522 in words is "one hundred fifty-five trillion, four hundred fifteen billion, forty-two million, one hundred forty-two thousand, five hundred twenty-two".