615146401642 has 4 divisors (see below), whose sum is σ = 922719602466. Its totient is φ = 307573200820.

The previous prime is 615146401627. The next prime is 615146401643. The reversal of 615146401642 is 246104641516.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 461569413321 + 153576988321 = 679389^2 + 391889^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 615146401595 and 615146401604.

It is not an unprimeable number, because it can be changed into a prime (615146401643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153786600409 + ... + 153786600412.

Almost surely, 2^615146401642 is an apocalyptic number.

615146401642 is a deficient number, since it is larger than the sum of its proper divisors (307573200824).

615146401642 is a wasteful number, since it uses less digits than its factorization.

615146401642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307573200823.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 615146401642 in words is "six hundred fifteen billion, one hundred forty-six million, four hundred one thousand, six hundred forty-two".