139520214561 has 32 divisors (see below), whose sum is σ = 228982555648. Its totient is φ = 73584624960.

The previous prime is 139520214557. The next prime is 139520214611. The reversal of 139520214561 is 165412025931.

It is a happy number.

It is not a de Polignac number, because 139520214561 - 2² = 139520214557 is a prime.

It is a super-2 number, since 2×139520214561² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (139520214521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2877126 + ... + 2925216.

It is an arithmetic number, because the mean of its divisors is an integer number (7155704864).

Almost surely, 2^139520214561 is an apocalyptic number.

It is an amenable number.

139520214561 is a deficient number, since it is larger than the sum of its proper divisors (89462341087).

139520214561 is a wasteful number, since it uses less digits than its factorization.

139520214561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58741.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 139520214561 in words is "one hundred thirty-nine billion, five hundred twenty million, two hundred fourteen thousand, five hundred sixty-one".