145720406631 has 16 divisors (see below), whose sum is σ = 194516356608. Its totient is φ = 97035768000.

The previous prime is 145720406627. The next prime is 145720406633. The reversal of 145720406631 is 136604027541.

It is a happy number.

It is not a de Polignac number, because 145720406631 - 2² = 145720406627 is a prime.

It is a super-2 number, since 2×145720406631² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145720406631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145720406633) 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, 10426210 + ... + 10440176.

It is an arithmetic number, because the mean of its divisors is an integer number (12157272288).

Almost surely, 2^145720406631 is an apocalyptic number.

145720406631 is a deficient number, since it is larger than the sum of its proper divisors (48795949977).

145720406631 is a wasteful number, since it uses less digits than its factorization.

145720406631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17702.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 145720406631 in words is "one hundred forty-five billion, seven hundred twenty million, four hundred six thousand, six hundred thirty-one".