125535421654 has 4 divisors (see below), whose sum is σ = 188303132484. Its totient is φ = 62767710826.

The previous prime is 125535421601. The next prime is 125535421657. The reversal of 125535421654 is 456124535521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 456124535521 = 277 ⋅1646658973.

It is a self number, because there is not a number n which added to its sum of digits gives 125535421654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125535421657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31383855412 + ... + 31383855415.

It is an arithmetic number, because the mean of its divisors is an integer number (47075783121).

Almost surely, 2^125535421654 is an apocalyptic number.

125535421654 is a deficient number, since it is larger than the sum of its proper divisors (62767710830).

125535421654 is an equidigital number, since it uses as much as digits as its factorization.

125535421654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62767710829.

The product of its digits is 720000, while the sum is 43.

The spelling of 125535421654 in words is "one hundred twenty-five billion, five hundred thirty-five million, four hundred twenty-one thousand, six hundred fifty-four".