135421545420551 has 16 divisors (see below), whose sum is σ = 152966982989184. Its totient is φ = 119038216045824.

The previous prime is 135421545420547. The next prime is 135421545420583. The reversal of 135421545420551 is 155024545124531.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 135421545420551 - 2² = 135421545420547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a junction number, because it is equal to n+sod(n) for n = 135421545420496 and 135421545420505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135421545429551) 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, 2995101590 + ... + 2995146803.

It is an arithmetic number, because the mean of its divisors is an integer number (9560436436824).

Almost surely, 2^{135421545420551} is an apocalyptic number.

135421545420551 is a deficient number, since it is larger than the sum of its proper divisors (17545437568633).

135421545420551 is a wasteful number, since it uses less digits than its factorization.

135421545420551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5990248490.

The product of its (nonzero) digits is 2400000, while the sum is 47.

The spelling of 135421545420551 in words is "one hundred thirty-five trillion, four hundred twenty-one billion, five hundred forty-five million, four hundred twenty thousand, five hundred fifty-one".