158421539962690 has 64 divisors (see below), whose sum is σ = 308574813133440. Its totient is φ = 58362236674560.

The previous prime is 158421539962613. The next prime is 158421539962733. The reversal of 158421539962690 is 96269935124851.

It is a happy number.

It is a super-2 number, since 2×158421539962690² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33725689 + ... + 38134828.

It is an arithmetic number, because the mean of its divisors is an integer number (4821481455210).

Almost surely, 2^{158421539962690} is an apocalyptic number.

158421539962690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

158421539962690 is a deficient number, since it is larger than the sum of its proper divisors (150153273170750).

158421539962690 is a wasteful number, since it uses less digits than its factorization.

158421539962690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71860867.

The product of its (nonzero) digits is 251942400, while the sum is 70.

The spelling of 158421539962690 in words is "one hundred fifty-eight trillion, four hundred twenty-one billion, five hundred thirty-nine million, nine hundred sixty-two thousand, six hundred ninety".