145987621751 has 16 divisors (see below), whose sum is σ = 151256322048. Its totient is φ = 140754369600.

The previous prime is 145987621733. The next prime is 145987621781. The reversal of 145987621751 is 157126789541.

It is a cyclic number.

It is not a de Polignac number, because 145987621751 - 2¹⁴ = 145987605367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145987621721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37325486 + ... + 37329396.

It is an arithmetic number, because the mean of its divisors is an integer number (9453520128).

Almost surely, 2^145987621751 is an apocalyptic number.

145987621751 is a deficient number, since it is larger than the sum of its proper divisors (5268700297).

145987621751 is a wasteful number, since it uses less digits than its factorization.

145987621751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8102.

The product of its digits is 4233600, while the sum is 56.

The spelling of 145987621751 in words is "one hundred forty-five billion, nine hundred eighty-seven million, six hundred twenty-one thousand, seven hundred fifty-one".