101287615493 has 12 divisors (see below), whose sum is σ = 109014867468. Its totient is φ = 93757253760.

The previous prime is 101287615469. The next prime is 101287615543. The reversal of 101287615493 is 394516782101.

It can be written as a sum of positive squares in 2 ways, for example, as 35260201729 + 66027413764 = 187777^2 + 256958^2 .

It is a de Polignac number, because none of the positive numbers 2^k-101287615493 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 (101287615453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10243730 + ... + 10253612.

It is an arithmetic number, because the mean of its divisors is an integer number (9084572289).

It is a 1-persistent number, because it is pandigital, but 2⋅101287615493 = 202575230986 is not.

Almost surely, 2^101287615493 is an apocalyptic number.

It is an amenable number.

101287615493 is a deficient number, since it is larger than the sum of its proper divisors (7727251975).

101287615493 is an frugal number, since it uses more digits than its factorization.

101287615493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19844 (or 9961 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 101287615493 in words is "one hundred one billion, two hundred eighty-seven million, six hundred fifteen thousand, four hundred ninety-three".