149636647251 has 192 divisors, whose sum is σ = 284525789184. Its totient is φ = 73672934400.

The previous prime is 149636647231. The next prime is 149636647297. The reversal of 149636647251 is 152746636941.

It is a happy number.

149636647251 is a `hidden beast` number, since 1 + 4 + 9 + 63 + 66 + 472 + 51 = 666.

It is not a de Polignac number, because 149636647251 - 2¹⁵ = 149636614483 is a prime.

It is a super-2 number, since 2×149636647251² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149636647201) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 82081726 + ... + 82083548.

It is an arithmetic number, because the mean of its divisors is an integer number (1481905152).

Almost surely, 2^149636647251 is an apocalyptic number.

149636647251 is a deficient number, since it is larger than the sum of its proper divisors (134889141933).

149636647251 is a wasteful number, since it uses less digits than its factorization.

149636647251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994 (or 1991 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 149636647251 in words is "one hundred forty-nine billion, six hundred thirty-six million, six hundred forty-seven thousand, two hundred fifty-one".