61536455436 has 24 divisors (see below), whose sum is σ = 145006699824. Its totient is φ = 20309060800.

The previous prime is 61536455429. The next prime is 61536455479. The reversal of 61536455436 is 63455463516.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25385115 + ... + 25387538.

It is an arithmetic number, because the mean of its divisors is an integer number (6041945826).

Almost surely, 2^61536455436 is an apocalyptic number.

It is an amenable number.

61536455436 is an abundant number, since it is smaller than the sum of its proper divisors (83470244388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61536455436 is a wasteful number, since it uses less digits than its factorization.

61536455436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50772761 (or 50772759 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 48.

The spelling of 61536455436 in words is "sixty-one billion, five hundred thirty-six million, four hundred fifty-five thousand, four hundred thirty-six".