145621535554 has 8 divisors (see below), whose sum is σ = 238289785488. Its totient is φ = 66191607060.

The previous prime is 145621535551. The next prime is 145621535573. The reversal of 145621535554 is 455535126541.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (145621535551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3309580332 + ... + 3309580375.

It is an arithmetic number, because the mean of its divisors is an integer number (29786223186).

Almost surely, 2^145621535554 is an apocalyptic number.

145621535554 is a deficient number, since it is larger than the sum of its proper divisors (92668249934).

145621535554 is a wasteful number, since it uses less digits than its factorization.

145621535554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6619160720.

The product of its digits is 1800000, while the sum is 46.

The spelling of 145621535554 in words is "one hundred forty-five billion, six hundred twenty-one million, five hundred thirty-five thousand, five hundred fifty-four".